A helper script named like a standard module breaks imports, as dis.py broke capstone

Symptoms

A script that imports capstone, or another library, fails with an AttributeError on a standard module: module 'dis' has no attribute ..., or partially initialized module.

Cause

Python puts the script's own folder first on the import path. A file in that folder named like a standard module (dis.py, code.py, struct.py) is imported in place of that module. The libraries the script uses import it too. In POD a disassembly helper named dis.py broke capstone. Capstone imports inspect, and inspect imports dis (observed).

What to do

Rename the script (disasm_at.py) and delete its __pycache__ copy. Name helper scripts after the game or the job (pod_dis.py, measure_gates.py). A single common word can match the name of a standard module.