Importlib problems with mpmath #5601
Description
Summary
Can't import mpmath, throws StopIteration in importlib/metadata/__init__.py.
Expected
Cloned https://github.com/mpmath/mpmath/, and then ran python3 from the root of the repository, import mpmath works as expected.
Actual
Using Rustpython (main, 8484bfa), the same procedure results in:
set value to PackageNotFoundError ignored
Traceback (most recent call last):
File "/home/duncan/Projects/RustPython/pylib/Lib/importlib/metadata/__init__.py", line 403, in from_name
return next(cls.discover(name=name))
StopIteration
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/duncan/Downloads/mpmath/mpmath/__init__.py", line 3, in <module>
__version__ = version(__name__)
File "/home/duncan/Projects/RustPython/pylib/Lib/importlib/metadata/__init__.py", line 894, in version
return distribution(distribution_name).version
File "/home/duncan/Projects/RustPython/pylib/Lib/importlib/metadata/__init__.py", line 867, in distribution
return Distribution.from_name(distribution_name)
File "/home/duncan/Projects/RustPython/pylib/Lib/importlib/metadata/__init__.py", line 405, in from_name
raise PackageNotFoundError(name)
PackageNotFoundError: mpmath