Forbid too many different positional arguments passing

Rule request

Thesis

If function gets many arguments they all should be keyword.

Bad:

get_report('daily', date_from, date_to, 'pdf', False)

Good:

get_report(period='daily', since=date_from, till=date_to, extension='pdf', cache=False)

Exceptions:

1. 1-2 positional parameters:

   get_report(since, till)
   

2. Function get *args, so all arguments have the same meaning:

   max(1, 2, 3, 12, 9)
   

Reasoning

It’s difficult to read. You can regulate it for your code via keyword-only arguments, but in big project it will be useful to forget it for third-party functions calls too.

[orsinium]

As possible solution we can block positional args of different types.

Bad:

some_func(1, 'test', [3, 4])

Good:

some_func(1, 2, 3, 4)
some_func('lol', 'lal', 'test')

[sobolevn]

Correct implementation is not possible, I have researched this topic.