Forbid returning too long tuples

Rule request

Thesis

Forbid returning a too long constant-length tuple from a function:

# bad
def hello():
  return 1, 2, 3, 4

When there are more than 2 values must be returned, use dataclasses.dataclass, typing.NamedTuple, or attrs instead.

Reasoning

Code readability and maintainability: the caller code must know exact order of all components which is easy to mess up. A real-world example:

time, phase, spacing, size, version, error, series_type = read_result_log()

😩

[uhbif19]

Please assign me, I am finishing PR for this task.

[orsinium]

Exactly! I don’t see a reason why return is any different from yield from this perspective 😃