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From "Graham Dumpleton (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (MODPYTHON-198) Python 2.5 nested auth functions in publisher.
Date Sun, 05 Nov 2006 06:08:17 GMT
     [ http://issues.apache.org/jira/browse/MODPYTHON-198?page=all ]

Graham Dumpleton resolved MODPYTHON-198.
----------------------------------------

    Resolution: Fixed

Looks like JIRA is not showing subversion commits or has not recorded some from when they
were doing their infrastructure update. Is fixed though. Ended up using:

        func_code = func_object.func_code
        func_globals = func_object.func_globals

        def lookup(name):
            i = None
            if name in func_code.co_names:
                i = list(func_code.co_names).index(name)
            elif func_code.co_argcount < len(func_code.co_varnames):
                names = func_code.co_varnames[func_code.co_argcount:]
                if name in names:
                    i = list(names).index(name)
            if i is not None:
                return (1, func_code.co_consts[i+1])
            return (0, None)

        (found_auth, __auth__) = lookup('__auth__')
        if found_auth and type(__auth__) == types.CodeType:
            __auth__ = new.function(__auth__, func_globals)

        (found_access, __access__) = lookup('__access__')
        if found_access and type(__access__) == types.CodeType:
            __access__ = new.function(__access__, func_globals)

        (found_realm, __auth_realm__) = lookup('__auth_realm__')
        if found_realm:
            realm = __auth_realm__

Ie., look in co_names first as co_varnames wasn't ordered correctly for older versions of
Python.

> Python 2.5 nested auth functions in publisher.
> ----------------------------------------------
>
>                 Key: MODPYTHON-198
>                 URL: http://issues.apache.org/jira/browse/MODPYTHON-198
>             Project: mod_python
>          Issue Type: Bug
>          Components: publisher
>    Affects Versions: 3.2.10
>            Reporter: Graham Dumpleton
>         Assigned To: Graham Dumpleton
>             Fix For: 3.3
>
>
> Jim Gallacher wrote:
> With python 2.5 I get 2 failures:
>     test_publisher_auth_nested
>     test_publisher_auth_method_nested
> It looks like something has changed in python 2.5 introspection that is
> messing up publisher.
> Test script testme.py
> ---------------------
> def testfunc():
>      print 'stuff'
>      def __auth__():
>          print '__auth__ called'
>      def __access__():
>          print '__access__ called'
> def main():
>      func_obj = testfunc
>      func_code = func_obj.func_code
>      print func_code.co_names
> if __name__ == '__main__':
>      main()
> Results
> -------
> $ python2.3 testme.py
> ('__auth__', '__access__')
> $ python2.4 testme.py
> ('__auth__', '__access__')
> $ python2.5 testme.py
> ()
> Dan Eloff points out that information is now in co_varnames.
> >>> fc.co_names
> ()
> >>> fc.co_varnames
> ('__auth__', '__access__')
> >>> def foo(a,b):
> 	d = 5
> 	def bar(c):
> 		return c
> >>> fc.co_names
> ()
> >>> fc.co_varnames
> ('a', 'b', 'd', 'bar')
> To get just args, try:
> >>> fc.co_varnames[:fc.co_argcount]
> ('a', 'b')
> And for just local vars:
> >>> fc.co_varnames[fc.co_argcount:]
> ('d', 'bar')
> Still need to work out if actual code objects for the functions are available in co_consts
or not. Ie., need to replace:
>         if "__auth__" in func_code.co_names:
>             i = list(func_code.co_names).index("__auth__")
>             __auth__ = func_code.co_consts[i+1]
>             if hasattr(__auth__, "co_name"):
>                 __auth__ = new.function(__auth__, func_globals)
>             found_auth = 1

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