Comment 3 for bug 970465

Personally I'm -1 on this. Theoretically there could be a directory with hundreds of files with only a handful of python files (whether they bear the .py suffix or not). Having to check every file for All variations of `#!/usr/bin/python(version)` seems extraordinary and impractical. One reason not to do this is the following:

Let's assume you have pyflakes installed under 2.6 (or even 2.5) while having files with a header that specifies python 3000 (any version you choose). It will fail upon compilation before it is even capable of doing any checks. That would be useless. On the other hand if you installed under python 3, there are object attributes that are no longer valid. I believe `iteritems` is a popular dictionary method that no longer exists on dictionaries in python 3.