Python Import Path Debugging When a ModuleNotFoundError occurs despite the package being installed, the issue is typically a Python path/environment mismatch. Check: (1) which Python executable the CLI script uses (check shebang and ), (2) which environment has the package installed vs. which the script is executing in, (3) whether the script is using a virtual environment that differs from your active shell environment. Verify with to confirm the correct interpreter is being used. ---