Sahi Pro - Sahi Script Editor
It allows conversion of steps into parameterized functions and extraction of constants.
Launching the Editor
Editor can be launched by clicking on the Editor link from Sahi dashboard.It can also be launched from the Sahi controller to edit the currently recorded script.
A typical editor window will look like this.
Navigator
This is the left-most panel in the editor and shows all the scripts, suites and other files in the scripts directory.
At the top of Navigator, there are three buttons. You can use them as follows:
Refresh: This button is used to refresh the directory so that newly added scripts are visible.
Link to Editor: If active, the name of script being edited will be scrolled to in the navigator menu.
Collapse: This will collapse the navigator and provide some additional space for the script editor.
The filter at the top of navigator is used to filter scripts based on the entered text. It can also be used to filter all suites and scripts.
All the scripts and suites are listed in a tree menu in the navigator.
If you click on the name of a script or suite, it will open up for editing in the script editor.
Also, if you right click on the name of script or suite, following menu is available.
Run: If playback properties are configured, it will start script execution. If not, it opens up the playback properties window. Once executed, scripts can be stopped by clicking on the "Stop All" button in the top menu.
Open: Opens the current file.
Logs: Opens the HTML logs for the current script.
Docs: Opens the script in documentation mode.
Rename: Makes the filename editable.
Delete: Deletes the file.
Script Editor
Script editor provides an interface to edit the Sahi scripts within a browser window.
The editor integrates with function creator and context editor to provide an easy interface to refactor the scripts. To edit a script, simply select the script from the navigator and start editing in the editor. Editor provides different interfaces for scripts, scenario and suites.
Context Panel
Context editor provides the ability to include any function from the scritps directory to the current script and include the file containing the function. It also allows changing the Accessor Repository parameters.Open context editor by clicking on the show context button. To include a function, search for the function in the function name. If the file containing the function is not included, the file path will be shown in red. After selecting a function, pass in the values for the arguments shown in the Arguments box. Click insert to call the function in present script. Click on Include button to include the file containing the function. The function will be added where the mouse pointer was before clicking on insert.
Click on the Open button next to File path to open the script containing function.
If the script is using an Accessor Repository, the Accessor Repository parameters can be modified by double clicking the line of code with object. This populates the Accessor Repository parameters and then these can be edited.
Click here to know more about recording with Accessor Repository.
Function Creator
To create a function out of the statements in a script, select the statements and then click on create function button.The following window will pop up. Provide a function name and click on continue.
You can also provide function names in
userdata/config/function_names.txt
file and select one of these while creating functions. This file can be edited using the Configure link on Dashboard and then selecting the file name from left navigation.Search
To search within a script, click inside the editor and then use either the search icon in the menu or CTRL + F to bring up the search bar.Scenario Editor
To edit a scenario file, just click on the file name from navigator. The CSV file is displayed in an excel like grid where it can be edited with the help of tools available to this view.Following tools are available while editing a scenario file.
1. Insert Testcase: Inserts a blank test case
2. Load Sahi library: Inserts the syntax to include a function library.
3. Function details: Shows all the details about the function that was selected before cliking the button. If the file containing the function is not included, you can click on the include button to include the file.
4. Import: Imports functions to the csv. Enter the functions that you want to import in the text area with proper arguments. Click on the import button to insert the functions in the scenario file.
Documentation tool
Sahi can be used as a documentation tool as well. While scripts can be recorded in documentation mode, documentation for already existing scripts can be generated by clicking on View Doc button. A new tab will open where the documentation can be edited and exported as HTMLPlayback
Script Editor enables playback of scripts/suites/data driven suites. Scripts can be played back on a single machine or distributed across machines.To configure playback properties, click on the Playback button in the top menu. It opens up the basic configurations required for the script execution.
-
If the user has selected some scripts/suites in the Navigator, and clicked on Playback, Sahi will automatically create a suite (selectedScripts.suite) containing the selected scripts/suites, and selectedScripts.suite will be chosen for playback.
-
If the user has selected one script/suite in the Navigator, that individual script/suite will be chosen for play back.
-
If no scripts have been selected in the Navigator, the script or suite file that is currently open (in focus) in the Editor will be chosen for playback.
Based on the playback properties set by the user, Sahi will execute the appropriate script or suite.
At the very minimum, you need to provide a start URL and browser name to execute the script. Script directory and script file fields show the file for which play button was clicked.
1. You can select the browser from the dropdown. This lists all the browsers configured on your machine. In case you are providing multiple nodes for distributed playback, this will list browsers from all nodes. One can choose more than one browser to run the script/suite in.
2. Provide a start URL for the script.
3. Click on the Play button to play the script. The default setup (Run in parallel with Threads as 5) lets you run the scripts in parallel with 5 simultaneous instances.
4. If you wish to run the scripts in the suite one after another within the same session, select "Run sequentially in single browser session".
5. If you wish to run the scripts in the suite one after another but in different browser sessions, select "Run in parallel" with Threads as 1.
Distributed Playback
Playback properties can be configured to distribute script execution across multiple machines.1. To distribute the playback across multiple machines, check the Distribute checkbox.
2. Click on the button to configure nodes for playback.
3. Provide the machine name and port number.
4. If you want to use the node for execution, check the "Use" checkbox for the node.
5. Click on Update button. This updates the node information for execution.
6. Click on Close button to close the node configuration window.
7. This allows you to add more space for additional nodes.
After configuring the nodes, you can click on play to execute the script or suite across machines.
1. By default Sahi will consider the localhost as the master node. If you want to use a different master, click the checkbox for Use Different Master.
2. Provide the machine name to be used as the host.
3. A default value of 9999 is present for port. If you are using a different port, you can update it here.
Advanced Playback Settings
While setting playback properties, following advanced settings can be configured by clicking on the "Show Advanced Settings" link.- Offline Reports: You can configure the storage of offline logs by setting the paths for various types of reports.
-
Click on the button to bring up the Logs Info Editor.
-
Provide the location for storing the logs.
- Unless you click on Use, the settings won't be considered. Click the Use checkbox for the type of logs that you want.
- Click on update to update the Offline logs settings.
- Once updated, you can close the Logs Info Editor.
-
Click on the button to bring up the Logs Info Editor.
- Send Email Reports:
You can enable sending email reports after script run on Success, Failure or both.
-
Click on the checkbox to enable sending email reports.
- Select the trigger for sending email reports. It can be either success or failure or both.
- Sahi uses the properties file present at
userdata/config/email.properties
to send the emails. You can click on this button to edit the email.properties file. You can change the properties file using other text editor as well.
danger The user needs to edit the email.properties and set the various properties. By default, none of the properties are set.
-
Click on the checkbox to enable sending email reports.
- Extra Parameters: You can pass extra parameters to script or suite before playback in form of key value pairs. These values can then be used within the scripts.
- Click on the button to open Extra Param Editor.
- Provide the name and value for the parameters.
- Click on Mask checkbox to hide the values of parameters from logs. This is useful for masking information like passwords.
- Update button populates the parameters and their values in Extra Parameters text box. This will be then passed on to the script.
- Click on close to close the Extra Param Editor.
- If you would like extra space for parameters, you can click the button to add an extra row.
- User Defined Id: You can provide a unique ID to be used as User Defined Id for the script//suite run.
This can be displayed in any type of log by changing
to<xsl:param name="showUserDefinedId" select="'false'" />
in the suites_list.xsl of userdata\config\reports\<xsl:param name="showUserDefinedId" select="'true'" />
. can be html, xml etc
Scheduling a Test
Tests can be scheduled to be executed on a future date using the Editor. To schedule the a script, open playback properties for the script and hover on the Run button. ClickSchedule
button from the dropdown.- Choose a date and time from the dropdown. Click OK to set the date.
- Provide a description(optional) for the test.
- Click on Schedule to schedule the test.


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The page you requested could not be found. Try using the navigation {% if site.search_enabled %}or search {% endif %}to find what you're looking for or go to this site's home page.


--- layout: example categories: example/v1.0.0 version: v1.0.0 title: Leaflet Image description: Zoom and pan around a map then take a screenshot as an image. tags: - plugins --- Take a snapshot


Sloths Are Great
Sloths are a group of arboreal Neotropical xenathran mammals, constituting the suborder Folivora. Noted for their slowness of movement, they spend most of their lives hanging upside down in the trees of the tropical rainforests of South America and Central America.


A VanillaJS plugin that uses the CSS3 image filters to replicate the tilt-shift effect. This is a proof of concept and currently only works in Webkit based browsers (Chrome, Safari, Opera).
This script is based on the original created by Noel Tock and Adam Yanalunas: http://www.noeltock.com/tilt-shift-css3-jquery-plugin/
Download here or go to github. Released under MIT License
Call the plugin on any collection of images you want by adding the following script:
<script src="path/to/tiltshift.min.js"></script>
<script>new TiltShift();</script>
Parameters on each image must be set using the HTML5 data attributes, like this:
<img src="url" class="tiltshift" data-position="50" data-blur="2" data-focus="10" data-falloff="10" data-direction="y">
The attributes will control various variables that influence the tiltshift effect.
If you're interested in licensing any of the images, please contact the photographers by following the links below:
Airplane / Stadium / Ocean / Skyscraper


First name:
Last name:
Yoga goals (tick all that apply):
I want to increase my flexibility
I want to improve my strength
I want to feel fitter
I want to feel calmer
Email:
Telephone:
Commitment:


Labels are used for grouping all agents from Elastigroup into one logical group in Jenkins.
Use spaces between each label.
For instance 'dev batchService' will assign a node the labels 'dev' and 'batchService'.
For example, if you have multiple jobs that builds/tests a certain service, you can configure the label of specific
Elastigroup to be the service name e.g 'batchService-1', then tie the relevant jobs to the 'batchService-1' label.
This allows your service jobs to run on any of that specific Elastigroup slaves but not on anywhere else.


com.wideverse.headlesswifimanager
com.wideverse.headlesswifimanager.data
com.wideverse.headlesswifimanager.helper
com.wideverse.headlesswifimanager.interfaces


Keep it Quiet: Overcoming the Latest Challenges in EMC Regulation
by Alex McCarthyDemystifying EMC will take place on Monday 10 February 2020 at the Silverstone Wing.
Demystifying EMC will take place on Monday 10 February 2020 at the Silverstone Wing.


So sweet to be hear the laughter of my children again, even if it's the hysterical-time-for-bed-could-turn-to-tears-at-any-moment laughter.
8/23/2012, 9:08:04 PM
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So sweet to be hear the laughter of my children again, even if it's the hysterical-time-for-bed-could-turn-to-tears-at-any-moment laughter.
8/23/2012, 9:08:04 PM
Favs: 0
Retweets: 0
link


Spells
This chapter describes the rules for creating spells. For those who wish to skip this section, there are example spells in Chapter 4. Rules for using spells are in Chapter 3.
Skill
Casting a spell requires an Intellect roll. The Mage or Sorcerer rolls this trait to determine if a spell succeeds.
Energy
Every spell has an energy level based on its base cost, intensity, area, and duration.
Intensity
The raw force of a spell. For attacks, this translates into damage. Each level of energy adds one to the intensity of a spell.
Range
Spells can normally be directed at any target within ten spaces. Adding 3 to the energy level of a spell doubles the range.
| +Energy | Range (spaces) |
|---|---|
| 0 | 10 |
| 1 | 12 |
| 2 | 16 |
| 3 | 20 |
| 4 | 25 |
| 5 | 30 |
| 6 | 40 |
| 7 | 50 |
| 8 | 60 |
| 9 | 80 |
| +Energy | Range (spaces) |
|---|---|
| 10 | 100 |
| 11 | 120 |
| 12 | 160 |
| 13 | 200 |
| 14 | 250 |
| 15 | 300 |
| 16 | 400 |
| 17 | 500 |
| 18 | 600 |
| 19 | 800 |
| 20 (max) | 1000 |
Area
By default, spells are directed at a single individual or space. A caster may choose more targets: adding 3 to the energy level of a spell doubles the area. Targets need not be adjacent.
Duration
By default, spells are fleeting - they are thrown, defended against, and resisted in one round. Spells may last longer: adding 3 to the energy level of a spell doubles the duration.
| +Energy | Area (spaces) or Duration (rounds) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 3 |
| 6 | 4 |
| 7 | 5 |
| 8 | 6 |
| 9 | 8 |
| +Energy | Area (spaces) or Duration (rounds) |
|---|---|
| 10 | 10 |
| 11 | 12 |
| 12 | 16 |
| 13 | 20 |
| 14 | 25 |
| 15 | 30 |
| 16 | 40 |
| 17 | 50 |
| 18 | 60 |
| 19 | 80 |
| +Energy | Area (spaces) or Duration (rounds) |
|---|---|
| 20 | 100 |
| 21 | 120 |
| 22 | 160 |
| 23 | 200 |
| 24 | 250 |
| 25 | 300 |
| 26 | 400 |
| 27 | 500 |
| 28 | 600 |
| 29 | 800 |
| +Energy | Area (spaces) or Duration (rounds) |
|---|---|
| 30 | 1000 |
| 31 | 1200 |
| 32 | 1600 |
| 33 | 2000 |
| 34 | 2500 |
| 35 | 3000 |
| 36 | 4000 |
| 37 | 5000 |
| 38 | 6000 |
| etc... |
Fun facts:
- 1 kilometer is 500 spaces long
- 250000 spaces in 1 square km
- 10 rounds in 1 minute
- 600 rounds in 1 hour
- 14400 rounds in 1 day
- 5256000 rounds in 1 year
Powers
Spells are composed of one or more powers from the Mage or Sorcerer side. Each power component of a spell has its own base energy cost, but all share the same intensity, area, and duration.
Mage Powers
| Name | Base Energy |
|---|---|
| Alter | 3 |
| Barrier | 3 |
| Disorient | 6 |
| Energy Blast | 6 |
| Impact Attack | 3 |
| Telekinesis | 10 |
| Portal | 10 |
Upon casting, the mage chooses the size of the portal and the place that it will connect to. The near side must be adjacent to the Mage; the far side can be anywhere the Mage can sense. The difficulty of an portal spell depends on the distance between the two points - the challenge level is equal to 3 + 1 per 5 spaces of distance. If the portal is to another world, the "distance" is chosen by The Adversary, as he must decide how much otherworldly travel He wishes to allow in his campaign.
Portals are symmetric. When a portal is created, individuals on both sides will see a glowing gateway and a glimpse of what lies on the other side. Anyone who can reach the portal, from either side, can go through it. Not only that, but the portal in each world is two-sided - this means, for example, that a portal opened from dry land to a place that is underwater will cause water to spew in two opposite directions, not one.
Mages on either side of a portal may try to nullify it.
Portals can be used to gather allies from other worlds. The ability to locate exotic creatures, however, does not automatically allow the mage to make friends with them. One who wants an otherworldly servant should be prepared to bribe, bully, or beg - and things from another world may not speak the magic user's language.
If one steps through a portal into another world, walks ten miles, then steps through another portal to get back to the first world, he will find himself ten miles from the spot where he stepped through the first portal, in the same direction that he was walking in the other realm. Thus, portals may be used to avoid certain physical barriers or known dangers of our world, but it will not save much time if used this way - and other worlds have barriers and dangers of their own.
The topography of different realms is not the same. When opening a portal at an unfamiliar location, a mage will often find that his portal is high above the ground, underground, or underwater in the world he desires to visit.
This power does not confer any special life support upon a traveller - if the user opens a portal to a place filled with a harmful substance (lava, acid, or the pressurized water at the bottom of an ocean), he will probably destroy himself and his immediate area.
There untold numbers of parallel realms. The mage who plans on exploration ought to have some knowledge of the place to be reached before attempting to travel there - to open a portal to a random world that the caster knows nothing about is suicidal.
Sorcerer Powers
| Name | Base Energy |
|---|---|
| Daze | 10 |
| Delude | 10 |
| Horrify | 6 |
| Telepathy | 3 |
| Torment | 6 |


COLUMNS and ROWS
Complicated Relationships
Maps
We are visual creatures. Therefore, we best comprehend information in a dimensional way, such as with graphs, charts, and maps. This includes blind people, who are usually forced to get their information in a linear way. Even those who are born blind are still born with minds that best process information "globally".
It's important to ensure that you are asking the right questions when you take all this data and prepare it for presentation, however. In the first example, I'm looking at populations as a way to help students from those tracts of poverty to get financial aid. In the second example, I'm looking at populations that can only attend school through online courses, as they are not mobile, and buses do not tend to service those areas.
Here is the table view of the graph above. There's three rows and 321 columms of data that went into making this chart.
What If I Want To Add Details To The Actual Table?
The W3.org has specific guidance as to how to handle tabular data in detail; it's on a page specifically dedicated to tabular data. There's even guidance, for example, as to when you use the caption element and when you should not! When trying to apply modifications to tabels in order to make them accessible, such as the Periodic Table, for example, "scope" has been suggested. But.
Despite being standard markup for tables for many years, some screen readers still do not fully support complex tables with spanned or multiple levels of row and/or column headers. When possible, try to 'flatten' the table and avoid spanned cells and multiple levels of header cells.


Add Link
Build Front-end libraries
1.  JavaScript: A DIY guide to build your own React
3. JavaScript: Reverse Engineering React [video]
4. JavaScript: Building React From Scratch [video]
5. JavaScript: Building Your Own React Clone in Five Easy Steps
6. JavaScript: Gooact: React in 160 lines of JavaScript
7. JavaScript: React Internals
8. JavaScript: Learn how React Reconciler package works by building your own lightweight React DOM
9. JavaScript: Build your own Vuejs
10. JavaScript: Build Yourself a Redux
11. JavaScript: Let’s Write Redux!
12. JavaScript: Redux: Implementing Store from Scratch [video]
13. JavaScript: Build Your own Simplified AngularJS in 200 Lines of JavaScript
14. JavaScript: Make Your Own AngularJS
15. JavaScript: How to write your own Virtual DOM
16. JavaScript: Building a frontend framework, from scratch, with components (templating, state, VDOM)


A Blog Too Far: 4 October 2015
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We give comprehensive analysis of the individual students on their conceptual understanding.This helps in assessment of their strengths and weaknesses. Analytics on the interaction with the voice assistant and assesment tests helps teachers to assist the students at an individual level.Every student needs special attention-EdarLabs makes it happen!
EdarLabs facilitates teachers to effectively convey the conceptual knowledge to students.We focus on hybrid teaching method which is a blend of both teacher-centered and student centred teaching method.Teacher plays an important role in our architecture unlike other digital teaching methods.
EdarLabs offers interactive conceptual simulations which helps students to analyse and have a comprehensive understanding.We improve the student's interpreting and analyzing skills through the interactive simulations and voice assistant encourages the students to come up with their own answers but not “mug up”.


Cloudinary Codename One
This library adds support for the Cloudinary image management service to Codename One apps. The library itself is a direct port of the Cloudinary Java SDK.
Installation
- Download the latest release of cloudinary-codenameone.cn1lib and copy it into your project's "lib" directory.
- Download BouncyCastleCN1Lib.cn1lib and copy it into your project's "lib" directory.
- Select "Codename One" > "Refresh Libs"
Configuration
Refer to the Cloudinary Java Integration Guide's Configuration Section for configuration information.
My preferred configuration in a Codename One app is to place the following inside my app's init()
method:
import com.cloudinary.Cloudinary;
...
Cloudinary cloudinary;
...
public void init() {
...
Cloudinary cloudinary = new Cloudinary(ObjectUtils.asMap(
"cloud_name", "my_cloud_name",
"api_key", "my_api_key",
"api_secret", "my_api_secret"));
// Disable private CDN URLs as this doesn't seem to work with free accounts
cloudinary.config.privateCdn = false;
...
}
License
Released under the MIT license.
Documentation
- JavaDocs
- Cloudinary Java Integration Guide - Most of this should be applicable to the Codename One Library
- Cloudinary Documentation Main Page
- Demo Codename One App
Building from Source
Check out the source from github:
git clone https://github.com/shannah/cloudinary-codenameone.git
This project is missing the following files that you will need to copy from another NetBeans codename One project.
- JavaSE.jar
- lib/CLDC11.jar
- lib/CodenameOne.jar
- lib/CodenameOne_src.zip
- CodenameOneBuildClient.jar
Once you have copied all of these files into the project, you can just open the project in Netbeans and build it.
If you run the project it will load a minimal demo app in the simulator that uses Cloudinary. You'll need to adjust the cloudinary credentials here to match your cloudinary account for the demo to work.
If you build the project, you will find the built cn1lib file at dist/cloudinary-codenameone.cn1lib


The Holdings tab on the live results page displays your positions and cash.
The following table describes the properties that display for each of your positions:
| Property | Description |
|---|---|
| Symbol | The ticker of the security. |
| Average Price | The average price that you paid for the position. |
| Quantity | The size of your position. |
| Market Value | The value of your position if sold with market orders. |
| Unrealized | The unrealized profit of your position, including fees and spread costs. |
The values in the positions section update as new data points are injected into your algorithm. The cash section displays the quantity of each currency in your algorithm's CashBook
. View the Holdings tab to see your holdings, add security subscriptions, and place manual orders. To view all of your current holdings and active data subscriptions, enable the Show All Portfolio check box.


Extracting Malicious Payloads from SFX Self-Extracting Installers
Self-extracting installers are an awesome way to distribute software because they require very little overhead and minimal configuration. Because of this, some malware threats use these SFX files to deploy components to victim systems, and malware analysts need to know how to safely unpack the components for investigation. For this example, we’re going to walk through the process to unpack this malicious installer: https://www.virustotal.com/gui/file/9d27976b21da5fc419da598ea44456a528b9fbf83f24fc5e14f697f610a5b295/detection.
The 7zip SFX Executable Format
7zip self-extracting installers are indeed Windows Portable Executable files, but they are a specialized format to themselves. To create a SFX file, you need two or three components:
- 7zip SFX Module (from the LZMA SDK)
- Installer Configuration Script (optional)
- 7zip archive containing content
The SFX module is a minimal Windows PE file designed to execute the contents of the configuration script and extract the archive included in the created SFX file. The configuration script contains plaintext commands in configuration stanzas, and this helps creators kick off specialized installations. Finally, the archive containing content is the actual payload we want to retrieve.
These components fit together rather easily when a creator executes copy /b 7z-module.sfx + config.txt + archive.7z installer.exe
. The SFX format assumes that all of these components are physically joined together, appended to the same file.
This means we can unpack the SFX by looking for the magic header bytes for a 7z archive to retrieve the malicious payloads inside.
Unpacking the Malicious Content
To unpack the content of a SFX file, we can open the file in a hex editor and look for the magic bytes of a 7z archive: 37 7A BC AF 27 1C
. Once we find those magic bytes, we can select all the bytes of the file from that header to the end of the file. After selection, we can copy those bytes and paste them into a new file to obtain the malicious payload.
Once we’ve created the new payload file from the copied bytes, we can open the file from any archive tool that supports 7z.
What About Password Protected SFXs?
The same method still works. The only difference is that our ending payload.7z archive will be password protected. If you have the password, it’s trivial to extract from there. If you don’t, get to cracking.
Bonus: The Configuration Script
Since the components of the SFX are physically appended together, this also means that the configuration script can be found as plaintext inside the bytes of the SFX file. To find it, search through instances of !@
until you find text that looks similar to this:
!@Something@!UTF-8!
...
!@SomethingEnd@!


What We Do
We are dedicated to catching swearing and bad faith texts but that feels limiting. We strive to be used in a way that can be used by professionals and the average tweeter. We went out to build something professionals could use in stressful work sessions. Imagine you need to let your coworker know you got the update, fast, but you're working on a hard problem you need to keep your attention on. A response you think is neutral to your coworker can easily sound snappy. Maybe your a rally coordinator and you're genuinely excited about this new rally, but being out all day has drained you emotionally and everything sounds flat and unappreciative. For Twitter specifically: we see a lot of us trying to make professional personas on there, and build friendly connections. So we thought of such a predictor could be used to try to craft a particular score range each time and keep a consistent mood with your coworkers or audience.


Dependencies with yield
¶
FastAPI supports dependencies that do some extra steps after finishing.
To do this, use yield
instead of return
, and write the extra steps after.
Tip
Make sure to use yield
one single time.
Info
For this to work, you need to use Python 3.7 or above, or in Python 3.6, install the "backports":
pip install async-exit-stack async-generator
This installs async-exit-stack and async-generator.
Technical Details
Any function that is valid to use with:
would be valid to use as a FastAPI dependency.
In fact, FastAPI uses those two decorators internally.
A database dependency with yield
¶
For example, you could use this to create a database session and close it after finishing.
Only the code prior to and including the yield
statement is executed before sending a response:
async def get_db():
db = DBSession()
try:
yield db
finally:
db.close()
The yielded value is what is injected into path operations and other dependencies:
async def get_db():
db = DBSession()
try:
yield db
finally:
db.close()
The code following the yield
statement is executed after the response has been delivered:
async def get_db():
db = DBSession()
try:
yield db
finally:
db.close()
Tip
You can use async
or normal functions.
FastAPI will do the right thing with each, the same as with normal dependencies.
A dependency with yield
and try
¶
If you use a try
block in a dependency with yield
, you'll receive any exception that was thrown when using the dependency.
For example, if some code at some point in the middle, in another dependency or in a path operation, made a database transaction "rollback" or create any other error, you will receive the exception in your dependency.
So, you can look for that specific exception inside the dependency with except SomeException
.
In the same way, you can use finally
to make sure the exit steps are executed, no matter if there was an exception or not.
async def get_db():
db = DBSession()
try:
yield db
finally:
db.close()
Sub-dependencies with yield
¶
You can have sub-dependencies and "trees" of sub-dependencies of any size and shape, and any or all of them can use yield
.
FastAPI will make sure that the "exit code" in each dependency with yield
is run in the correct order.
For example, dependency_c
can have a dependency on dependency_b
, and dependency_b
on dependency_a
:
from fastapi import Depends
async def dependency_a():
dep_a = generate_dep_a()
try:
yield dep_a
finally:
dep_a.close()
async def dependency_b(dep_a=Depends(dependency_a)):
dep_b = generate_dep_b()
try:
yield dep_b
finally:
dep_b.close(dep_a)
async def dependency_c(dep_b=Depends(dependency_b)):
dep_c = generate_dep_c()
try:
yield dep_c
finally:
dep_c.close(dep_b)
And all of them can use yield
.
In this case dependency_c
, to execute its exit code, needs the value from dependency_b
(here named dep_b
) to still be available.
And, in turn, dependency_b
needs the value from dependency_a
(here named dep_a
) to be available for its exit code.
from fastapi import Depends
async def dependency_a():
dep_a = generate_dep_a()
try:
yield dep_a
finally:
dep_a.close()
async def dependency_b(dep_a=Depends(dependency_a)):
dep_b = generate_dep_b()
try:
yield dep_b
finally:
dep_b.close(dep_a)
async def dependency_c(dep_b=Depends(dependency_b)):
dep_c = generate_dep_c()
try:
yield dep_c
finally:
dep_c.close(dep_b)
The same way, you could have dependencies with yield
and return
mixed.
And you could have a single dependency that requires several other dependencies with yield
, etc.
You can have any combinations of dependencies that you want.
FastAPI will make sure everything is run in the correct order.
Technical Details
This works thanks to Python's Context Managers.
FastAPI uses them internally to achieve this.
Dependencies with yield
and HTTPException
¶
You saw that you can use dependencies with yield
and have try
blocks that catch exceptions.
It might be tempting to raise an HTTPException
or similar in the exit code, after the yield
. But it won't work.
The exit code in dependencies with yield
is executed after Exception Handlers. There's nothing catching exceptions thrown by your dependencies in the exit code (after the yield
).
So, if you raise an HTTPException
after the yield
, the default (or any custom) exception handler that catches HTTPException
s and returns an HTTP 400 response won't be there to catch that exception anymore.
This is what allows anything set in the dependency (e.g. a DB session) to, for example, be used by background tasks.
Background tasks are run after the response has been sent. So there's no way to raise an HTTPException
because there's not even a way to change the response that is already sent.
But if a background task creates a DB error, at least you can rollback or cleanly close the session in the dependency with yield
, and maybe log the error or report it to a remote tracking system.
If you have some code that you know could raise an exception, do the most normal/"Pythonic" thing and add a try
block in that section of the code.
If you have custom exceptions that you would like to handle before returning the response and possibly modifying the response, maybe even raising an HTTPException
, create a Custom Exception Handler.
Tip
You can still raise exceptions including HTTPException
before the yield
. But not after.
The sequence of execution is more or less like this diagram. Time flows from top to bottom. And each column is one of the parts interacting or executing code.
Info
Only one response will be sent to the client. It might be one of the error responses or it will be the response from the path operation.
After one of those responses is sent, no other response can be sent.
Tip
This diagram shows HTTPException
, but you could also raise any other exception for which you create a Custom Exception Handler. And that exception would be handled by that custom exception handler instead of the dependency exit code.
But if you raise an exception that is not handled by the exception handlers, it will be handled by the exit code of the dependency.
Context Managers¶
What are "Context Managers"¶
"Context Managers" are any of those Python objects that you can use in a with
statement.
For example, you can use with
to read a file:
with open("./somefile.txt") as f:
contents = f.read()
print(contents)
Underneath, the open("./somefile.txt")
creates an object that is a called a "Context Manager".
When the with
block finishes, it makes sure to close the file, even if there were exceptions.
When you create a dependency with yield
, FastAPI will internally convert it to a context manager, and combine it with some other related tools.
Using context managers in dependencies with yield
¶
Warning
This is, more or less, an "advanced" idea.
If you are just starting with FastAPI you might want to skip it for now.
In Python, you can create Context Managers by creating a class with two methods: __enter__()
and __exit__()
.
You can also use them inside of FastAPI dependencies with yield
by using
with
or async with
statements inside of the dependency function:
class MySuperContextManager:
def __init__(self):
self.db = DBSession()
def __enter__(self):
return self.db
def __exit__(self, exc_type, exc_value, traceback):
self.db.close()
async def get_db():
with MySuperContextManager() as db:
yield db
Tip
Another way to create a context manager is with:
using them to decorate a function with a single yield
.
That's what FastAPI uses internally for dependencies with yield
.
But you don't have to use the decorators for FastAPI dependencies (and you shouldn't).
FastAPI will do it for you internally.


io.gearpump.streaming
Example:
val data = "This is a good start, bingo!! bingo!!" app.fromCollection(data.lines.toList). // word => (word, count) flatMap(line => line.split("[\\s]+")).map((_, 1)). // (word, count1), (word, count2) => (word, count1 + count2) groupBy(kv => kv._1).reduce(sum(_, _))
val appId = context.submit(app) context.close()
Example:
val data = "This is a good start, bingo!! bingo!!" app.fromCollection(data.lines.toList). // word => (word, count) flatMap(line => line.split("[\\s]+")).map((_, 1)). // (word, count1), (word, count2) => (word, count1 + count2) groupBy(kv => kv._1).reduce(sum(_, _))
val appId = context.submit(app) context.close()


Hello!
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Hi! My name is Charlotte!
I am an artist from Colorado currently living in Chicago,
Enjoy my site!
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I have been diagnosed with Bipolar type 1
and basically I make art to cope.
But i dont take myself too seriously!
The clock is ticking
death is always on the horizon ;)
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Check it if you are spamer
Yes, I am spamer
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Watch: Endangered baby giraffe makes public debut
by EuronewsA rare baby giraffe made his public debut at a northern Czech zoo earlier this week, just 12 days after being born in the enclosure.
He was born on 25 October at Liberec Zoo and belongs to the Rothschild's Giraffe sub-species, of which there are thought to be fewer than 2,000 still living in the wild, according to the IUCN Red List of Threatened Species.
Unveiled on Wednesday, the as-yet-unnamed baby already stands 190cm tall and weighs around 60 kilograms.
Zoo director David Nejedlo said the baby's mother had also been born in the zoo, which has been breeding the animals for more than 30 years.
Forty-six giraffes have been born in the zoo since that time, and the current herd number is four – two adult females, another youngster aged two years, and the new arrival.
Numbers of giraffes living in the wild in African countries are decreasing, making breeding programmes in zoos more and more important, according to Nejeldo.
Video editor • Ivan Sougy


GitHub vs. GitLab
Git is a distributed implementation of version control. Many people have written very eloquently about why it is a good idea to use version control, not only if you collaborate in a team but also if you work on your own; one example is this article from RStudio’s Support pages.
In short, its main feature is that version control allows you to keep track of the changes you make to your code. It will also keep a history of all the changes you have made in the past and allows you to go back to specific versions if you made a major mistake. And Git makes collaborating on the same code very easy.
Most R packages are also hosted on GitHub. You can check out their R code in the repositories if you want to get a deeper understanding of the functions, you can install the latest development versions of packages or install packages that are not on CRAN. The issue tracker function of GitHub also makes it easy to report and respond to issues/problems with your code.
Why would you want to leave GitHub?
Public repositories are free on GitHub but you need to pay for private repos (if you are a student or work in academia, you get private repos for free). Since I switched from academia to industry lately and no longer fulfil these criteria, all my private repos would have to be switched to public in the future. Here, GitLab is a great alternative!
GitLab offers very similar functionalities as GitHub. There are many pros and cons for using GitHub versus GitLab but for me, the selling point was that GitLab offers unlimited private projects and collaborators in its free plan.
Tutorial
Migrating from GitHub to GitLab with RStudio is very easy! Here, I will show how I migrated my GitHub repositories of R projects, that I work with from within RStudio, to GitLab.
Beware, that ALL code snippets below show Terminal code (they are NOT from the R console)!
Migrating existing repositories
You first need to set up your GitLab account (you can login with your GitHub account) and connect your old GitHub account. Under Settings &Account, you will find “Social sign-in”; here click on “Connect” next to the GitHub symbol (if you signed in with your GitHub account, it will already be connected).
Once you have done this, you can import all your GitHub repositories to GitLab. To do this, you first need to create a new project. Click on the drop-down arrow next to the plus sign in the top-right corner and select “New project”. This will open the following window:
Here, choose “Import project from GitHub” and choose the repositories you want to import.
If you go into one of your repositories, GitLab will show you a message at the top of the site that tells you that you need to add an SSH key. The SSH key is used for secure communication between the GitLab server and your computer when you want to share information, like push/pull commits.
If you already work with GitHub on your computer, you will have an SSH key set up and you can copy your public SSH key to GitLab. Follow the instructions here.
Here is how you do it on a Mac:
- Look for your public key and copy it to the clipboard
cat ~/.ssh/id_rsa.pub
pbcopy < ~/.ssh/id_rsa.pub
Then paste it into the respective field here.
The next step is to change the remote URL for pushing/pulling your project from RStudio. In your Git window (tab next to “Environment” and “History” for me), click on Settings and “Shell”.
Then write in the shell window that opened:
git remote set-url origin git@<GITLABHOST>:<ORGNAME>/<REPO>.git
You can copy the link in the navigation bar of your repo on GitLab.
Check that you now have the correct new gitlab path by going to “Tools”, “Project Options” and “Git/SVN”.
Also check your SSH key configuration with:
ssh -T git@<GITLABHOST>
If you get the following message
The authenticity of host 'gitlab.com (<IP_ADDRESS>)' can't be established.
ECDSA key fingerprint is ...
Are you sure you want to continue connecting (yes/no)?
type “yes” (and enter passphrase if prompted).
If everything is okay, you now get a message saying Welcome to GitLab!
Now, you can commit, push and pull from within RStudio just as you have done before!
In case of problems with pushing/pulling
In my case, I migrated both, my private as well as my company’s GitHub repos to GitLab. While my private repos could be migrated without a hitch, migrating my company’s repos was a bit more tricky (because they had additional security settings, I assume).
Here is how I solved this problem with my company’s repos:
I have protected my SSH key with a passphrase. When pushing or pulling commits via the shell with git pull
and git push origin master
, I am prompted to enter my passphrase and everything works fine. Pushing/pulling from within RStudio, however, threw an error:
ssh_askpass: exec(/usr/X11R6/bin/ssh-askpass): No such file or directory
Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
I am using a MacBook Pro with MacOS Sierra version 10.12.6, so this might not be an issue with another operating system.
The following solution worked for me:
- Add your SSH key
ssh-add ~/.ssh/id_rsa
- And reinstall VS Code
Now I could commit, push and pull from within RStudio just as before!


|
CoMFi
0.0.1
Collisional Multi-Fluid ion code
|
All the classes, enums and types can be found here. More...
Classes | |
| struct | Constants |
| This data structure holds all the important constants. More... | |
| class | Context |
| The simulation context. More... | |
| struct | Settings |
| The settings for the simulation (used in main loop) are here. More... | |
Enumerations | |
| enum | BoundaryCondition { PERIODIC, DIRICHLET, NEUMANN, MIRROR, DIMENSIONLESS } |
| The Boundary Condition enum. More... | |
All the classes, enums and types can be found here.
The Boundary Condition enum.


Commentary: Hong Kong poll win will embolden protesters
by Joe LeahyVictory in the Hong Kong District Council polls will give democrats more channels of influence, says the Financial Times’ Joe Leahy.
SINGAPORE: For months, Beijing has described Hong Kong’s protesters as “behaving like terrorists” manipulated by foreign forces against the will of a suffering population.
On Sunday (Nov 24), the people of Hong Kong gave their verdict in the first vote since the demonstrations erupted in June.
In one of the biggest voter turnouts in Hong Kong history, the pro-democracy camp won 17 of 18 districts — compared with zero in the last poll four years ago.
Some of the most prominent pro-Beijing figures lost their seats while hardline democracy activists won theirs.
A PEACEFUL VOTE
Despite concerns of violence, the vote was peaceful. There were no clashes between police and black-clad protesters, just candidates and their supporters waving to passersby.
The elections followed one of the most disruptive fortnights in the protests. Police laid siege to universities and protesters snarled up transport forcing schools to close.
One of the sieges, at Hong Kong Polytechnic University, was still under way on Monday — a week after it began.
Analysts thought the violence might weaken popular support for the movement. The district council elections have put paid to that speculation.
READ: Commentary: This may be the end of Hong Kong as we know it
READ: Commentary: Hong Kong campus siege widens split between moderates, radicals
THE POWERS THE COUNCILS HAVE
The councils lack political power, mostly advising the government on quotidian community matters.
But the victory will give the pro-democracy camp new channels of influence.
The winner of the district council elections can nominate six people to the Legislative Council, Hong Kong’s de facto parliament, and 117 people to the 1,200-member election committee of mostly pro-Beijing loyalists that selects the city’s chief executive.
The significance of the district council elections, however, is that they are the most direct vote in the territory. They are decided by simple majority, in contrast to the LegCo poll that gives an outsized voice to business.
This poll was a referendum on the protest movement.
A DEEPENING CRISIS
The crisis facing the Hong Kong government and its Beijing masters has now deepened.
An emboldened protest movement will press its demands even harder, including those for universal suffrage in the election of Hong Kong’s leader and an independent inquiry into allegations of police brutality.
One solution might be for Beijing to offer political reform. This would not be unprecedented.
In 2014, President Xi Jinping made a proposal according to which Beijing would provide a list of screened candidates for the leadership. Hong Kong voters would be able to elect one of them by direct vote.
This was rejected by the pro-democracy camp but Beijing could try to produce another plan for consideration. That at least would raise the prospect of a political solution to the city’s dilemma.
READ: Commentary: A very gloomy outlook for Hong Kong’s economy
READ: Commentary: China lifted 850 million people out of poverty but now faces bigger challenges
READ: Hong Kong leader vows to 'listen humbly' to voters after shock poll result
The most likely result, however, is that the Communist party will continue to hold firm to its position.
The past months will have convinced Mr Xi that Hong Kong cannot be trusted with the autonomy it already enjoys, let alone any more.
“This is David against Goliath! Hurrah!” tweeted one supporter of Jimmy Sham, a pro-democracy candidate who was beaten by thugs with hammers ahead of the elections.
It looks like Hong Kong’s days of tear gas and rubber bullets are not over.


Picturefill
A responsive image polyfill
Officially endorsed by the RICGAn img with srcset
and sizes
attributes
<img
sizes="(min-width: 40em) 80vw, 100vw"
srcset="examples/images/medium.jpg 375w,
examples/images/large.jpg 480w,
examples/images/extralarge.jpg 768w"
alt="…">
Here's how that renders in the browser. Feel free to resize to see it change.


{% extends 'registration/form_base.html' %} {% block header %}Forgotten your password? Enter your email address below, and we'll email instructions for setting a new one.{% endblock %} {% block buttonText %}Reset my password{% endblock %}


Hany Essam
Jr Developer
Work Experience
-
Blogger
2016-PresentWrite Software Development related articles at my Blog.
-
Sales Executive
2015-2016Enterprise Account Manager at Etisalat Misr.
-
Sales Executive
2008-2012Distribution Sales Executive at Mobinil.
Education
-
University Of The People
2016-2020Computer Science and Mathematics
-
Ministry of Communication and Information Technology(MCIT)
2012-20139 month scholarship, +1200 training hours of the .Net framework and C#
-
The High Institute of Technology
2003-2007Bachelor Degree in Information Systems.
Courses and Certificates
-
Coursera
2012Full Stack Web Development Specialization.
- HTML, CSS and Javascript
-
Udacity
2012CS101 Building a Search Engine using Python.
-
Microsoft - MCP
2012Microsoft Certified professional Developer
- MCPD
- MCTS


I’ve installed force measurement devices in the walls here. They detect whenever a particle bounces off the wall, and how hard.
Carefully throw the ball at a wall.
Throw the ball with a lot of force.
Since the particles only collides with the wall for an instant, the collisions show up as narrow spikes in the graph. Short impacts like these are called impulses.
Drag the ball toward the edge of the box, and keep dragging even as the mouse is outside the box.
This simulates you pushing the ball toward the wall, which puts pressure on the wall. And not just a short spike, but continuous pressure that doesn’t let up until you let go.
I’ve installed force measurement devices in the walls here. They detect whenever a particle bounces off the wall, and how hard. Try throwing the particle at the wall at different speeds.


Ultimate CSS Grid Course
This is the template you can use to follow along the course.
Item 1
Item 2
Item 3
Item 4
Item 5
Item 6


Apostle Joseph Cookey rolls out Christmas plans for widows
Apostle Joseph Cookey, a Nigerian cleric recently showed his philanthropic nature by empowering market women with millions to boost their respective businesses.
The River State, born pastor who answered the call to serve God in 2006, and started his own ministry, Awesome God ministries in 2012 is known for the impact his ministry has made in a short while.
Few days ago, the Apostle visited 4 different markets in Rivers State, where he gifted over 300 market women with over 15 million naira to support their businesses as Christmas approaches.
According to Apostle Joseph Cookey, who is happily married to Mrs. Tina Cookey, he plans to do more for the widows and less privileged before the fast approaching Yuletide.
READ ALSO: Group empowers over 1000 widows
“Next month, before Christmas I plan to package good things, money, gifts, for the widows and the needy. The mission of Awesome God ministries is to win souls back to God, reconcile men to God as well as putting smiles on the faces of less privileged. With this we are restoring hope to the hopeless. We also use this as a means to exercising authority in the life of the sick and the depressed,” he said.
aving the likes of Bishop David Oyedepo, Apostle Johnson Suleiman and Pastor Sunny Cookey as his role models, Apostle Cookey performs wonders and miracle through the power of God.
His Ministry also hosts a yearly event titled ‘Emergency demand urgent response’. While his Bible School, Awesome God Prophetic School, has also been able to impact sound biblical knowledge, training lot of pastors in the past four years of its establishment.


Seventh SPLICE Workshop Schedule
All times Eastern Daylight Time (EDT)
Day 1 - Monday, March 15 (10-12:30)
09:45 - Workshop doors open: Find the zoom link at pathable. (Should appear under Schedule -> My Agenda)
10:00 - 10:30 Introduction to the SPLICE project by Cliff Shaffer and Peter Brusilovsky
10:30 - 10:55 LTI, Caliper, and the SPLICE Live Catalog by Bob Edmison, Alex Hicks, Kamil Akhuseyinoglu
11:00 - 11:45 Working Group reports
- Code Snapshots: Ayaan Kazerouni and Thomas Price (slides)
- PEML: Steve Edwards (slides)
- Curriculum Packaging: Cory Bart (slides)
11:45 - 12:00 Instrument, Integrate, Improve: OLI Next-Gen for CSEd by Greg Bunyea and Erin Czerwinski (slides)
12:00 - 12:30 Using Data to Improve CS Learning by Ken Koedinger
Day 2 - Tuesday, March 16 (10-12:30)
09:00 - 10:00 SPLICE Morning Coffee Chat: Zoom Link [Note: This is not the workshop zoom link!]
09:45 - Workshop doors open: Find the zoom link at pathable. (Should appear under Schedule -> My Agenda. Note that Day 2 zoom link might not be the same as Day 1.)
10:00 - 10:10 Introduction for the day by Peter Brusilovsky
10:10 - 11:15 Smart Content Tools and Platforms
- 10:10-10:25 Ari Korhonen, Giacomo Mariani, Peter Sormunen, Jan-Mikael Rybicki, Aleksi Lukkarinen, Lassi Haaranen, Artturi Tilanterä and Juha Sorva. New Acos Content Types (video)
- 10:25-10:40 Matthew West, Nathan Walters, Mariana Silva, Timothy Bretl and Craig Zilles. Integrating Diverse Learning Tools using the PrairieLearn Platform
- 10:40-10:50 Barbara Ericson and Bradley Miller.Runestone's Question Bank, Exam Generator, and Log Data (slides)
- 10:50-11:00 Cay Horstmann. Microservices for Score and State Saving of Aggregated Interactive Assignments (slides)
- 11:00-11:10 Leo Ureel II. Integrating a Colony of Code Critiquers into WebTA (slides)
11:15 - 11:30 Breakout Room Conversations
11:30 - 12:15 Services and Data
- 11:20-11:35 Sebastian Serth, Thomas Staubitz, Ralf Teusner and Christoph Meinel. CodeOcean and CodeHarbor: Auto-Grader and Code Repository (slides)
- 11:35-11:45 Bob Edmison, Austin Cory Bart and Stephen Edwards. A Proposed Workflow For Version-Controlled Assignment Management (slides)
- 11:45-11:55 Charles Koutcheme, Juho Leinonen, Juha Sorva and Arto Hellas. Analyzing Fine-Grained Material Usage Behavior
- 11:55-12:05 Nea Pirttinen and Juho Leinonen. Exploring the Complexity of Crowdsourced Programming Assignments (slides)
12:15 - 12:25 Breakout Room Conversations
12:25 - 12:30 Workshop Wrapup
Post-Workshop Events
Thursday, March 18, 3:00 - 4:00 EDT: PEML Working Group Discussion Zoom Link
Thursday, March 18, 4:00 - 5:00 EDT: Code Snapshots Working Group Discussion Zoom Link


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