Function not Running inside an "if" statement Python 3 -

i'm attempting write escape room game in python.
when run code pycharm process ends "process finished exit code 0."

is there wrong in defining of functions?
here code (its bit lengthy):

choice = none  def main_choice():      print("1. examine door")      print("2. examine painting")      print("3. examine desk")      print("4. examine bookshelf")      choice == input("make choice: ")   def door():      print("1. try open door")      print("2. take closer look")      print("3. go were.")      door_choice = input("what now? ")      if door_choice == "1":          print("the door heavy open bare hands.")          door()      if door_choice == "2":          print("there red light above door, seems have no purpose.")          print("you notice 9 key keypad next door. looks accept 3 digit code.")          keypad_code = input("would enter code?").lower          if keypad_code == " yes":               guess = input("enter code: ")               if guess == complete_key:               print("the light turns green , hear sound of mechanical lock unlocking. door opens.")               print("you win!!!")          if guess != complete_key:               print("wrong code.")               main_choice()      if door_choice == "3":          main_choice()      else:          print("you didn't answer")   main_choice()  if choice == "1":      print("you walk door")      door() 

i think might last "if" statement, i'm not positive.

you need change choice == input("make choice: ") choice = input("make choice: ") in main_choice function:

def main_choice():      print("1. examine door")      print("2. examine painting")      print("3. examine desk")      print("4. examine bookshelf")      choice = input("make choice: ") 

otherwise choice variable still none , if choice == "1": false.