Remove pd_array from tests

[olgarithms]

• closes remove pd_array from tests MarcoGorelli/pyladieslondon-sprints#7
• tests passed
• Ensure all linting tests pass, see here for how to run them
• whatsnew entry

[MarcoGorelli]

Thanks @olgarithms looks good

I forgot to mention this when I wrote the issue, but now we can make the relevant CI check stricter. Could you please also:

• in pandas/tests/frame/test_constructors.py, change test_constructor_stdlib_array test so it has from array import stdlib_array instead of import array (and then use stdlib_array instead of array.array in that little test)
• in scripts/check_for_inconsistent_pandas_namespace.py, line 32, remove array
• run pre-commit run inconsistent-namespace-usage --all-files and check it passes

Then this should be good to go 👍

cc @jorisvandenbossche @jbrockmendel as you'd both commented on pd_array usage (in #40150 it seemed there was agreement on using pd_array internally in core, and the public API pd.array in tests)

[olgarithms]

Thanks for looking @MarcoGorelli !

As for the changes, I understand the one for the pre-commit, but can you explain what stdlib_array is and where it is supposed to live? I do not see where it is defined.

When I do the change as you mention, I get this error:
ImportError: cannot import name 'stdlib_array' from 'array'

[MarcoGorelli]

Hey @olgarithms - sorry, I mistyped, I mean to write from array import array as stdlib_array (array is a standard library module)

[MarcoGorelli]

Thanks @olgarithms