Function is called multiple times when importing but runs only once when used in the .py file where it was created [duplicate]

so I don't get something and would like some help in figuring this out as I can't seem to find anything of use googling around.

I have the following function in a .py file:

def rng(start, stop):
    if start == stop:
        return random.choice([start, stop])
    elif stop < start:
        return random.randrange(stop, start)
    else:
        return random.randrange(start, stop)

Then in another .py file I go ahead, import it and do a print like so:

from random_generator import rng

print(rng(10, 100))

What I don't understand is why do I get 2 numbers printed instead of one? I've been looking into this but am unable to find an answer. If doing the same thing in the random_generator.py file I get only one number, but if importing the function it outputs 2 numbers..

# Output when doing the print in random_generator:
55

# Output when doing the print via importing the rng function in another .py file:
12
44

Edit: There is no other print function in the random_generator.py file, I have deleted the print function after testing this thing.