Cannot install `ruamel.yaml`: `Can't find a pure Python 3 wheel for ruamel-yaml-clib>=0.2.6`

🐛 Bug

I cannot install ruamel.yaml on Pyodide.

To Reproduce

>>> await micropip.install('ruamel.yaml', keep_going=True)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/lib/python3.10/site-packages/micropip/_micropip.py", line 552, in install
    raise ValueError(
ValueError: Can't find a pure Python 3 wheel for: 'ruamel-yaml-clib>=0.2.6; platform_python_implementation == "CPython" and python_version < "3.11"'
See: https://pyodide.org/en/stable/usage/faq.html#micropip-can-t-find-a-pure-python-wheel

I see that this dependency should only be installed for CPython, but apparently micropip is trying to pull it anyways?

Expected behavior

Installing ruamel.yaml works.

Environment

• Pyodide Version: _How can I know? I’m on https://pyodide.org/en/latest/console.html_
• Browser version: Firefox 104.0

[hoodmane]

it is a bug in micropip which is happening because it canonicalize the requested package name.

I don’t think this is correct. I did the following:

pyodide.loadPackage("micropip");
pyodide.runPythonAsyinc(`import micropip; await micropip.install("ruamel.yaml", deps=False)`);
pyodide.runPython(`
import sys
from ruamel.yaml import YAML
yaml = YAML()
d = dict(a=dict(b=2),c=[3, 4])
yaml.dump(d, sys.stdout)
`);

and it printed:

a:
  b: 2
c:
- 3
- 4

So I think it works fine. If you try without deps=False, then you get an error about ruamel-yaml-clib, which we aren’t building. The solution would be to build ruamel-yaml-clib as well.

[ryanking13]

I found that micropip.install("ruamel.yaml") is still not available though… it is a bug in micropip which is happening because it canonicalize the requested package name.