Wiki/python.md

Python

• Disable request for wallet: python3 -m keyring --disable
  • https://stackoverflow.com/a/68760190/5464989

Virtualenv

• Of specific version:
  • Make sure version is available in /usr/bin/
  • Create env: `virtualenv -p .venv

Other

• Show packages imported at startup: python -X importtime -m <pythonFile>
  • Useful to verify lazy loading

Profiling

• Run profiler: python -m cProfile -o out.out -- <FILE> <ARGS>
• Visualize as flow chart: python -m gprof2dot -f pstats out.out | dot -Tpng -o out.png
  • Deps: gprof2dot
  • By default, excluded negligible nodes/edges. Set --node-thres 0 (-n) and --edge-thres 0 (-e) to include all
• Visualize as starburst (interactively): python -m snakeviz out.out
  • Deps: snakeviz

Profile single function/method

• Import from profilehooks import profile
• Add @profile to function to profile

Make some local module available to another module

Useful for developing a plugin

• Create symlink to that moduel in .venv/lib/python3.11/site-packages/

Paths

Use paths that are relative to the source file

• Define BASE = Path(__file__).parent.resolve()
• Define all paths relative to BASE: BASE / "bla.bla"