3 ms·

same goes with python - def foo(x=None, y=None): ... foo(x=1, y=2) foo(1, y=2) foo(1, 2)

• DonaldPShimoda 7y ago
  You can also disable positional handling via * to require keywords in function calls, e.g.: def add(*, l, r): return l + r add(l=1, r=2) >>> 3 add(1, r=2) >>> [...] >>> TypeError: add() takes 0 positional arguments but 1 positional argument (and 1 keyword-only argument) were given I believe 3.8 is adding / (I think) to do the same but for positional arguments, i.e., arguments you cannot give by keyword.
• echelon 7y ago
  Just be careful not to use mutable objects as your default args.
  • emptysea 7y ago
    A great reason to add flake8 to your CI edit: forgot that flake8 doesn't check for mutable arguments by default – need to add https://github.com/PyCQA/flake8-bugbear https://github.com/PyCQA/flake8-bugbear
    • j88439h84 7y ago
      Pylint does