Importing local module fails

`pyimport` doesn't seem to be able to find python modules that are present in the local directory. Any reason for this? What's the best way to import user modules?

Start by reproducing the local-module import failure through the `pyimport` entry point described in the issue. Trace how local Python modules are discovered and verify the expected behavior by confirming that a user module in the current directory can be imported successfully.

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