如何定义"movie_list“函数

Question

*对于我的代码，我有三个选项:查看电影列表、添加到列表中或从列表中删除。我的问题是我不知道如何定义我的movie_list函数。在下面你可以看到我到目前为止所写的东西。该菜单可以工作，但是每当我输入list时，我总是会得到一个错误的my_list函数。*

def main():
    movie_list = [["Spirited Away"],["Whiplash"],["The Dark Night"]]  
    

#Menu where you can select to view the list, add a movie to the list, delete a movie from the list, or exit the program.

def movie_menu():
     print("Movie Menu")
     print("list-Display all movies")
     print("add-Add a movie")
     print("del-Delete a movie")
     print("exit-Exit program")
     
     
     
#Program where you type the commands to "add","delete","exit",or "view" the list.
movie_menu()
while True:
    command = input("Command:")
    if command == "list":
        list(movie_list)
    elif command == "add":
        add(movie_list)
    elif command == "del":
        delete(movie_list)
    elif command == "exit":
        break
    else: 
        print("Not a valid command. Please try again.")
print("Goodbye!!")
        
        
**def list(movie_list):
    for i in range(len(movies)):
        print(str(i+1) + "." + movies[i]) - The code I need help on
        print(movie_list)
**
def add(movie_list):
    name = input("Name:")
    movie = []
    movie.append(name)
    movie_list.append(movie)
    print(movie[0] + "was added.\n")
    
def delete (movie_list):
    num = int(input("Number:"))
    if number < 1 or number > len(movie_list):
        print("Invalid movie number.\n")
    else:
        movie = movie_list.pop(number-1)
        print(movie[0] + "was deleted.\n")


    main()
    list(movie_list)

Answer 1

list()已经是python中的一个函数。当您编写调用列表( movie_list )时，它正在访问一个名为movie_list的列表，然后什么也不做，因为您没有对它做任何事情。接下来要做的事情是将函数移到代码的顶部。Python一次运行一行，在代码中调用函数时不创建函数。