On 11/29/2010 01:22 PM, Brett Cannon wrote:
On Mon, Nov 29, 2010 at 03:53, Sylvain Thénault <sylvain.thena...@logilab.fr> wrote:On 25 novembre 11:22, Ron Adam wrote:On 11/25/2010 08:30 AM, Emile Anclin wrote:hello, working on Pylint, we have a lot of voluntary corrupted files to test Pylint behavior; for instance $ cat /home/emile/var/pylint/test/input/func_unknown_encoding.py # -*- coding: IBO-8859-1 -*- """ check correct unknown encoding declaration """ __revision__ = 'éééé' and we try to find that module : find_module('func_unknown_encoding', None). But python3 raises SyntaxError in that case ; it didn't raise SyntaxError on python2 nor does so on our func_nonascii_noencoding and func_wrong_encoding modules (with obvious names) Python 3.2a2 (r32a2:84522, Sep 14 2010, 15:22:36) [GCC 4.3.4] on linux2 Type "help", "copyright", "credits" or "license" for more information.>from imp import find_modulefind_module('func_unknown_encoding', None)Traceback (most recent call last): File "<stdin>", line 1, in<module> SyntaxError: encoding problem: with BOMI don't think there is a clear reason by design. Also try importing the same modules directly and noting the differences in the errors you get.IMO the point is that we can consider as a bug the fact that find_module tries to somewhat read the content of the file, no? Though it seems to only doing this for encoding detection or like since find_module doesn't choke on a module containing another kind of syntax error. So the question is, should we deal with this in pylint/astng, or can we expect this to be fixed at some point?Considering these semantics changed between Python 2 and 3 w/o a discernable benefit (I would consider it a negative as finding a module should not be impacted by syntactic correctness; the full act of importing should be the only thing that cares about that), I would consider it a bug that should be filed.
The output of imp.find_module() returns an open file io object, and it's output feeds directly into to imp.load_module().
>>> imp.find_module('pydoc')
(<_io.TextIOWrapper name=4 encoding='utf-8'>,
'/usr/local/lib/python3.2/pydoc.py', ('.py', 'U', 1))
So I think the imp.find_module() is suppose to be used when you *do* want to do the full act of importing and not for just finding out if or where module xyz exists.
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