Coding Improvement

[snippsat]

Thank you for your help, but i have question i just need 6 atm digit for my homework should i decrase the range for faster completion time, or they dont make any different? Thank you

Also how to install numba properly?

It was more a example on how to speed up code a lot,i don't think you should give Numba code as a solution.
Without the ability to use external libraries or multiprocessing,and given the straightforward nature of a brute-force search,
there are limitations to how much the efficiency of this algorithm can be improved with pure Python.
Can clean it up a little.

from time import time

def find_pin(target_pin):
    for guess in range(1000000):
        if guess == target_pin:
            return True
    return False

def valid_pin(pin):
    return pin.isdigit() and len(pin) == 6

pin_input = input("Enter PIN: ")
start = time()
if not valid_pin(pin_input):
    print("Entered PIN is invalid")
else:
    target_pin = int(pin_input)
    if find_pin(target_pin):
        print(f"Found PIN in {time() - start} seconds.")
    else:
        print("PIN not found.")

Numba you install with pip.