comb missing from math module

[SaadiSave]

Environment data

• Language Server version: 2020.8.2
• OS and version: Ubuntu 20.04 LTS
• Python version (& distribution if applicable, e.g. Anaconda): 3.8.2

Expected behaviour

from math import comb

Import resolved without errors

Actual behaviour

But the class works perfectly when used in:

O = inp(9, 0.32, [4, 5])
O.setdist()
print(O.rnddist(4))

Logs

None

Code Snippet / Additional information

None

[jakebailey]

You have a typeCheckingMode above "off", so you're seeing these sorts of type errors. The type stubs for math do not declare comb: https://github.com/python/typeshed/blob/master/stdlib/2and3/math.pyi

I can see that the python docs say it exists in 3.8+: https://docs.python.org/3.8/library/math.html#math.comb

So this is a typeshed bug and would need to be fixed there. The stub contains other things added in 3.8, so it was likely an oversight.

[erictraut]

I just submitted a PR to the typeshed repo to add the missing function: python/typeshed#4489

[SaadiSave]

Has an update been released to fix the issue?

[jakebailey]

No, not yet. We release once a week, typically Wednesday or Thursday. We close the issues marked as "fixed in next version" when the fix is available.

[jakebailey]

This issue has been fixed in version 2020.9.0, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#202090-3-september-2020