type checking

[Skaperen]

Python doesn't do type checking of passed arguments in function calls so i do that on my own. but, at least i can do checks that allow multiple types. and i can even check the types being passed inside dictionaries, lists, tuples, sets, and frozensets.

[DeaD_EyE]

TypeHints are not checked during runtime. They are helpers for IDEs.
For example I modify this code: https://python-forum.io/Thread-Counting-...0#pid88370

from typing import (
    NamedTuple,
    Iterable,
    Any,
)

 
class CountIndexResult(NamedTuple):
    count: int
    index: int

 
def count(iterable_or_gen: Iterable, value: Any) -> CountIndexResult:
    first_index = None
    count = 0
    for index, element in enumerate(iterable_or_gen):
        if element == value:
            if first_index is None:
                first_index = index
            count +=1
    return CountIndexResult(count, first_index)


print(count([2,2,2,2,2,2,1,1,1,1,1,1,2,2], 1))

If you use this code for exmaple with Pycharm, it will detect wrong data-types.
It's highlited, if you take for the first argument a non-iterable.
But this will not checked during runtime, but together with pydantic it will.

[Skaperen]

how do you specify that your function needs a list or tuple of length 2 with an int and a string in any order?

[ndc85430]

Why are you modelling whatever that is in that way? Why not with a class or at least a namedtuple?

[Skaperen]

the function just needs an int and a string. it takes them as 2 arguments or as a 2-list or as a 2-tuple. it also accepts them in the order int,string or string,int. i should probably add set and frozenset to what it accepts. how is making it a class any better? how does requiring a named tuple help call this function?