condensing try except

[Gribouillis]

I don't understand your objection. One can ask the user to input 3 different probabilities by calling proba_input() 3 times

for i in range(3):
    qux = proba_input('Give me the {}-th probability: '.format(i))

The line with partial is only a way to define a new callable (proba_input) by specifying two arguments for typed_input.

Consider the following example

>>> def is_multiple_of(a, b):
...     return b % a == 0
... 
>>> is_multiple_of(5, 15)
True
>>> is_multiple_of(5, 14)
False
>>> from functools import partial
>>> is_even = partial(is_multiple_of, 2)
>>> is_even(14)
True
>>> is_even(13)
False
>>> is_even(12)
True
>>> is_even(9)
False