`--remove-literal-statements` doesn't work

[Jan Max Meyer]

Hi!

First of all, thank you very much for writing this software. It is very useful to decrease the size of Python's standard library when exposing it for web-apps running with Pyodide, a full CPython 3.8 compiled to web-assembly and running in the browser.

Anyway, it seems I found a bug, because the --remove-literal-statements does not seem to have any effect on the provided sources. These two calls return exactly the same result. Docstrings are everywhere.

$ pyminify  0.py >a.txt 
$ pyminify --remove-literal-statements 0.py  >b.txt 

Attached are the results I got. I'm on pyminify 2.4.1 as installed from PyPI, the used Python version for execution is 3.9.1, but I also tested it with 3.8.2 with the same result.

0.py => this is the __init.py__ of Python 3.8.2's collections standard library package
a.txt
b.txt

[Jan Max Meyer]

Supplement: After a few further tests, I found out that the docstring from other modules seems to be removed properly - except in the case with the 0.txt above. (__init__.py from cpython/Lib/collections)

[Daniel Flook]

Hi @phorward, thanks for creating an issue.

It looks like this is because the problem modules use the global __doc__ name or .__doc__ attributes, which currently disable all literal removal. This doesn't always work correctly, but cautiously leaves docstrings in if unsure.

I do plan to make this more flexible, see #11.

[Jan Max Meyer]

@dflook Thanks for the quick answer! Yes, it seems that this module uses __doc__, but with a different context, so it shouldn't break. But it's OK for me, and I'm looking forward so that #11 is getting fixed.