How to know that two pyc files contain the same code

Chris Angelico rosuav at gmail.com
Sun Mar 11 02:15:11 CET 2012


On Sun, Mar 11, 2012 at 9:52 AM, Steven D'Aprano
<steve+comp.lang.python at pearwood.info> wrote:
> On Sat, 10 Mar 2012 15:48:48 +0100, Gelonida N wrote:
> Define "identical" and "the same".
>
> If I compile these two files:
>
>
> # file ham.py
> x = 23
> def func():
>    a = 23
>    return a + 19
>
>
>
> # file = spam.py
> def func():
>    return 42
>
> tmp = 19
> x = 4 + tmp
> del tmp
>
>
> do you expect spam.pyc and ham.pyc to count as "the same"?

They do not contain the same code. They may contain code which has the
same effect, but it is not the same code.

I don't think Python has the level of aggressive optimization that
would make these compile to the same bytecode, but if it did, then
they would _become identical_ per the OP's description - that they
contain identical bytecode. In fact, I think the OP defined it quite
clearly.

ChrisA



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