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TODO.md

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TODOs

  • Add --ignore-attributes-for-classes option. When visiting such a class, mark all its attributes as used. Fixes (partly):
  • Honor (speaking) pylint error codes (e.g., # pylint: disable=unused-import): unused-import, unused-variable, unused-argument, possibly-unused-variable and unreachable-code. See https://github.com/janjur/readable-pylint-messages#unused-import.

Non-TODOs

  • Ignore hidden files and directories (might be unexpected, use --exclude instead).
  • Use Assign instead of Name AST nodes for estimating the size of assignments (KISS).
  • Only count lines for unused code by storing a function get_size in Item for computing the size on demand. This is 1.5 times as slow as computing no sizes.
  • Compute sizes on demand. Storing nodes increases memory usage from ~120 MiB to ~580 MiB for tensorflow's Python code.
  • Detect unreachable code for ast.Assert (assert False is common idiom for aborting rogue code).
  • Detect superfluous expressions like a <= b, 42, foo and bar occurring outside of a statement (hard to detect if code is unneeded).
  • Detect that body of if foo: is unreachable if foo is only assigned "false" values (complicated: e.g., foo = []; foo.append(1); if foo: ...).
  • Use coverage.py to detect false-positives (#109). Workflow too complicated.
  • Ignore some decorators by default: @app.route, @cli.command.
  • Ignore functions in conftest.py files that start with "pytest_".