Profile script python
CPU profiling sorted by cumulative time
python3 -m cProfile -s cumulative script.py | head -30
more python
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Debug with pdb
python3 -m pdb script.py
Set breakpoint in code
breakpoint() # Python 3.7+ — drops into pdb at this line
Run tests with pytest
pytest -x -v --tb=short tests/
Check syntax without running
python3 -m py_compile script.py && echo OK
Format code with black
black --check --diff . && black .