def accumulatorFunction ( target , source , env ) :
    "str"
    destDir = str ( target [ 0 ] )
    if not os . path . exists ( destDir ) :
        os . makedirs ( destDir )
    for s in source :
        s = str ( s )
        if os . path . isdir ( s ) :
            my_copytree ( s , destDir , env , symlinks = False )
        else :
            shutil . copy2 ( s , destDir

def accumulatorFunction ( target , source , env ) :
    "str"
    destDir = str ( target [ 0 ] )
    if not os . path . exists ( destDir ) :
        os . makedirs ( destDir )
    for s in source :
        s = str ( s )
        if os . path . isdir ( s ) :
            my_copytree ( s , destDir , env , symlinks = False )
        else :
            shutil . copy2 ( s , destDir )

次に示すpythonコードの誤りを修正しなさい。