python - How to write multiple signature hints in PyCharm with Python3 -

i written function argument on left, similar built-in range function

the problem is, how write type hints can show 2 way should invoked.

for example, when type command+p(ctrl+p) in range function in pycharm(range object in py3, not problem):

self:range, stop: int ------------------------------------------------- self:range, start: int, stop: int, step: int=-1 

but my_range:

def my_range(start: int, stop: int = none, step: int=1): """ list_range(stop)  list_range(start, stop, step)  return list of integers start (default 0) stop, incrementing step (default 1).  """ if stop none:     start, stop = 0, start return list(range(start, stop, step)) 

after type command + p , got:

start: int, stop: optional[int], step: int=-1 

does knows how implement that? many help!

try typing module! it's got lot of helpers type annotations, including typing.optional. use this:

import typing  def f(required_arg: int, optional_arg:typing.optional[int]=none):     # ...