Exiting a for Loop & Enumeration (Python)

Question

我是Python的新手，正在做一个训练营项目...而且我绝对让它变得比它需要的更难......

我最终要做的是创建以下内容：

1. 名称： 泰坦尼克号 导演： 斯皮尔伯格 年份： 1997 \

2. 名称：矩阵 导演： 瓦斯科夫斯基斯 年份： 1996 \

在我用"(A(dd 电影功能...所以，首先，我似乎无法"退出"For 循环......一旦我运行它，它就会无限期地重复......除此之外，如果我尝试使用"枚举"，我将无法获得正确的格式。

这是我的代码：(我所说的部分在"def show_movies"函数下：

import sys
import random
import os
movies = []

def menu():
global user_input
print("Welcome to 'The Movie Program!!'")
print("(A)dd movie to your list")
print("(L)ist movies you've added")
print("(S)earch for movies in your list")
user_input = str(input("Which function would you like to do?:nn""Selection: ").capitalize())
while user_input != 'Q':
if user_input == 'A':
add_movies()
elif user_input == 'L':
show_movies()
elif user_input == 'A':
search_movies()
else:
print("nn--Unknown command--Please try again.n")
print("Welcome to 'The Movie Program!!'")
print("(A)dd movie to your list")
print("(L)ist movies you've added")
print("(S)earch for movies in your list")
user_input = str(input("Which FUNCTION would you like to do?:nn""Selection: ").capitalize())

def add_movies():
#name = (input('What is the title of the movie?: ').title())
#director = str(input("Who was the director of this movie?: ").title())
year = None
while True:
try:
name = (input('What is the title of the movie?: ').title())
director = str(input("Who was the director of this movie?: ").title())
year = int(input("What was the release year?: "))
except ValueError:
print("Only numbers, please.")
continue
movies.append({
"name": name,
"director": director,
"year": year
})
break
menu()

add_movies()

def show_movies():
for movie in movies:
print(f"Name: {movie['name']}")
print(f"Director: {movie['director']}")
print(f"Release Year: {movie['year']}n")
#continue
#break

def search_movies():
movies
print("This is where you'd see a list of movies in your database")

menu()

Answer 1

问题出在您的while user_input != 'Q':循环中。

如果user_input等于L，则它调用show_movies()，但不要求更多输入。它只是在每次调用show_movies()的while循环中转一圈又一圈。

每次通过循环都应再次输入user_input，而不仅仅是在else子句中。

while user_input != 'Q':
if user_input == 'A':
add_movies()
elif user_input == 'L':
show_movies()
elif user_input == 'A':
search_movies()
else:
print("nn--Unknown command--Please try again.n")
print("Welcome to 'The Movie Program!!'")
print("(A)dd movie to your list")
print("(L)ist movies you've added")
print("(S)earch for movies in your list")
# the next line is now outside your `else` clause
user_input = str(input("Which FUNCTION would you like to do?:nnSelection: ").capitalize())