TIL py3 partials don't mind multiple values for arguments

py3_partials.py

>>> def f(a, b):
...   return a, b
...

# py27
>>> partial(f, b=1)(1, 2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: f() got multiple values for keyword argument 'b'

# py37
>>> partial(f, b=1)(a=1, b=2)
(1, 2)