[Python-ideas] Add a cryptographic hash (e.g SHA1) of source toPython Compiled objects?
tjreedy at udel.edu
Wed Feb 4 07:17:22 CET 2009
rocky at gnu.org wrote:
> Without a doubt you all are much more familiar at this stuff that I
> am. (In fact I'm a rank novice.) So I'd be grateful if someone would
> post code for a function say:
> compare_src_obj(python_src, python_obj)
> that takes two strings -- a Python source filename and a Python object
> -- does what's outlined above, and returns a status which indicates
> the same or if not and if not whether the difference is because of the
> wrong version of Python was used.
Interesting question. For equaility, I would start with, just guessing
marshal(compile(open(file.py).read())) == open(file.pyc).read()
Specifically for version clash, I believe the first 4 bytes are a magic
version number. If that is not part of the marshal string, it would
need to be skipped for the equality comparison.
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