Bobby Impollonia <bob...@gmail.com> added the comment: > Can you please post an example Python module that has this markup you are > asking for, so I can show you how to achieve what you want without the markup?
Hi, Martin. Here's a real-world example: http://www.sqlalchemy.org/trac/browser/lib/sqlalchemy/types.py?rev=6884:b181f1e53603 The syntax is: # Py3K # <python 3 code> # Py2K <python 2 code> # end Py2K For example, starting on line 152 we have, # Py3K #return unicode(self.compile()) # Py2K return unicode(self.compile()).\ encode('ascii', 'backslashreplace') # end Py2K When the code is converted with 2to3, the py3k code on line 153 will be uncommented and used to replace the py2k code on lines 155-156. Having the py3k version commented before conversion resolves the issue that "you must not use syntax that is exclusively Python 3 in an if-python3 block". Here is their modified version of 2to3 to support this syntax: http://www.sqlalchemy.org/trac/browser/sa2to3.py Their explanation is: "This tool monkeypatches a preprocessor onto lib2to3.refactor.RefactoringTool, so that conditional sections can replace non-fixable Python 2 code sections for the appropriate Python 3 version before 2to3 is run." ---------- nosy: +bobbyi _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue10070> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
