有没有办法将这些用户定义的函数存储在外部文件中？

Question

我是一个相对较新的程序员，我正在从事一个大学项目，我希望能够使用文件处理来存储我的一些代码之外的工作，但我不太确定如何，最好我想将我的用户定义函数存储在一个文件中，但我不太确定如何去做或者甚至可能。

我想在外部存储的代码如下：

#This is my combat module, I Call on this every time the user enters combat
def combat():
    print("""To defeat the enemy you must hit a higher number than them, if the enemy hits higher you die""")
    player_damage = random.randrange(7,15)
    print("\nYou hit for: ", player_damage)
    enemy_damage = random.randrange(1, 10)
    print("The enemy hit for: ", enemy_damage)

    if player_damage > enemy_damage:
        print("\nYou successfully defeated the enemy")
    elif enemy_damage  > player_damage:
        print("\nThe enemy strikes a fatal blow and you die almost instantly")
        GameOver()

#Game Over function
def GameOver():
    #Plays everytime the user dies
    print("This is the end of your journey, thanks for playing.")
    input("\nPress enter to exit")

#A simple fuction for when the user needs to choose yes or no
def YesNo():
    while True:
        answer = input("(y/n): ")
        if answer in ('y', 'n'):
            break
        print("Invalid input.")
    if answer == 'y':
        return True
    else:
        return False

#Displays the logo
def welcome():
    #Introduce the game to the player
    print("Welcome to:")
    print("""
  _______ _             _____                 
 |__   __| |           / ____|                
    | |  | |__   ___  | |     __ ___   _____  
    | |  | '_ \ / _ \ | |    / _` \ \ / / _ \ 
    | |  | | | |  __/ | |___| (_| |\ V /  __/ 
    |_|  |_| |_|\___|  \_____\__,_| \_/ \___| 
                      / _|                    
                 ___ | |_                     
                / _ \|  _|                    
               | (_) | |                      
     __  __     \___/|_|           _          
    |  \/  |         | |          (_)         
    | \  / |_   _ ___| |_ ___ _ __ _  __ _    
    | |\/| | | | / __| __/ _ \ '__| |/ _` |   
    | |  | | |_| \__ \ ||  __/ |  | | (_| |   
    |_|  |_|\__, |___/\__\___|_|  |_|\__,_|   
             __/ |                   (v1.0)   
            |___/                           """)