gun simulator

firearm.py

import time


def fire_gun(magazine_capacity, reserve_capacity, fire_rate, time_to_reload):
    """parameters including the numerator/denominator, fire rate, and reload speed"""

    rounds = magazine_capacity
    
    
    def reloading(time_to_reload):
        print('\nRELOADING', end='')
        for dot in range(time_to_reload):
            time.sleep(1)
            print('.', end='', flush=True)
            
            
    print('\nHold ENTER to shoot')
    print('\n\n{}/{}'.format(rounds, reserve_capacity))
    
    
    while rounds > 0 or reserve_capacity > 0:
        shoot = input()

        rounds -= 1
        print('{}/{}'.format(rounds, reserve_capacity))

        if rounds == 0 and reserve_capacity == 0:
            print('OUT OF AMMO')
            break
        elif shoot.upper() == 'DONE':
            sure = input('Are you sure?\n> ')
            if sure.lower() == 'y':
                break
        elif rounds == 0:
            reloading(time_to_reload)
            if reserve_capacity <= magazine_capacity:
                rounds += reserve_capacity
                reserve_capacity -= reserve_capacity
            else:
                rounds += magazine_capacity
                reserve_capacity -= magazine_capacity
            print('\n\n{}/{}'.format(rounds, reserve_capacity))
                

        time.sleep(fire_rate)   # Faster!!


def start():
    guns = {
        'ASSAULT': lambda: fire_gun(40, 130, 0.1, 7),
        'SHOTGUN': lambda: fire_gun(6, 30, 2, 12),
        'SUBMACHINE': lambda: fire_gun(40, 200, 0, 5),
        'SNIPER': lambda: fire_gun(1, 15, 0, 5),
        'MARKSMAN': lambda: fire_gun(20, 100, 0.8, 9),
        'PISTOL': lambda: fire_gun(10, 100, 0.6, 3),
        'LAUNCHER': lambda: fire_gun(1, 10, 0, 7)
    }
    while True:
        firearm = input('CHOOSE YOUR GUN (ENTER to exit; VIEW to view gun selection)\n> ').upper()
        
        if firearm == 'VIEW':
            print('\n')
            for gun in guns:
                print('| {}'.format(gun), end=' ')
            print('|\n')
            start()
        try:
            guns[firearm]()
        except KeyError:
            break
            
            
if __name__ == "__main__":
    start()

You added in another never returning recursion in line 66. Either put a continue there, which will skip the rest of the loop, or move try: ... except: ... into an else branch.