A comma after a value turns it into
tuple. Probably not what you intended to do.
As far as the Python parser is concerned the parentheses are optional for non-empty tuples. According to the documentation: it is actually the comma which makes a tuple, not the parentheses. The parentheses are optional, except in the empty tuple case.
By accidentally suffixing a comma on
value = 1, expect to get a
TypeError when the code later attempts to perform integer operations on a variable that evaluated to
If our GitHub code review bot spots this issue in your pull request it gives this advice:
Code Review Doctor will run this check by default. No configuration is needed but the check can be turned on/off using check code
probably-meant-not-tuple in your pyproject.toml file.