class NavRegistry ( CoreRegistry ) :
    version = "str"
    author = _ ( "str" )
    author_email = "str"
    description = _ ( "str" )
    url = {
        "str" : lazy_reverse ( "str" ) ,
        "str" : lazy_reverse ( "str" ) ,
    { }

class NavRegistry ( CoreRegistry ) :
    version = "str"
    author = _ ( "str" )
    author_email = "str"
    description = _ ( "str" )
    url = {
        "str" : lazy_reverse ( "str" ) ,
        "str" : lazy_reverse ( "str" ) ,
    }

次に示すpythonコードの誤りを修正しなさい。