[Python-3000] BytesWarning for str != bytes

[Georg Brandl]

Hi,

python -b warns when you do "a" == b"a".  However, it doesn't warn when
you do "a" != b"a" which occurs not as frequently, but is usually also a
sign of a bug.

See the aifc.py module:

     def initfp(self, file):
         ...
         self._file = Chunk(file)
         if self._file.getname() != 'FORM':
             raise Error('file does not start with FORM id')

Where getname() returns a bytes object.  Wouldn't it make sense to have
!= issue the same warning as ==?

Georg

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