Last updated on May 31, 2020 by Dan Nanni
Since .pyc
files are in binary format, you may attempt to either compare their md5sum
outputs, or use cmp
command to do binary diff
. However, using these tools will not work for .pyc
files as is, because .pyc
files contain extra metadata in them, which may be different even when the byte code itself is identical.
More specifically, the first 4 bytes of a .pyc
file store a "magic" number which identifies the version of Python used to compile .pyc
file. The next 4 bytes contain the timestamp of the Python source file.
Therefore, what you can do is to ignore the first 8 bytes of .pyc
files, and compare the rest of the files. This can be achieved by the following command.
$ cmp <(tail -c +8 file.pyc) <(tail -c +8 file2.pyc)
Note that this command works for bash
shell.
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