如何在字典中查找用戶輸入值並顯示它們（如果存在）

Question

MENU_PROMPT = "\nEnter 'a' to add a movie, 'l' to see your movies, 'f' to find a movie by title, or 'q' to quit: "
movies = []

# And another function here for the user menu
selection = input(MENU_PROMPT)

def movie_data():
    title = input("Enter the movie title: ")
    director = input("Enter the movie director: ")
    year = input("Enter the movie release year: ")

    movies.append({
        'title': title,
        'director': director,
        'year': year
    })


def display():
    print("movies =", end =" ")
    for movie in movies:
        print(movie['title'])


while selection != 'q':
    if selection == "a":
        movie_data()
    elif selection == "l":
        display()
    elif selection == "f":
        find = input("enter the movie title")
        if find in movies:
            print("movie found.", movies)
        else:
            print(f'No Such Movie, Named {find}, Found!, Try Other Movie Name.')
    else:
        print('Unknown command. Please try again.')

    selection = input(MENU_PROMPT)

如果用戶輸入 f 以在電影字典中查找電影名稱，那么我在最后一個 elif function 中寫什么，誰能解釋一下？

我想要 - （用戶輸入電影名稱） - 復仇者 output - 找到匹配，電影名稱 - 復仇者，導演 - （用戶輸入的內容）和年份 - （用戶輸入的內容）

Answer 1

你有一個包含標題、導演和年份鍵的字典列表。 假設用戶輸入標題，您可以遍歷列表並搜索標題的匹配項：

movies.append({
    'title': "title",
    'director': "director",
    'year': "year"
})

for m in movies:
    if m.get('title').lower().find("title") > -1:
        print("true")
    else:
        print("false")

Answer 2

您可以進行搜索 function 迭代列表中的每個元素並在字典中搜索 title 屬性。

MENU_PROMPT = "\nEnter 'a' to add a movie, 'l' to see your movies, 'f' to find a movie by title, or 'q' to quit: "
movies = []

# And another function here for the user menu
selection = input(MENU_PROMPT)

def movie_data():
    title = input("Enter the movie title: ")
    director = input("Enter the movie director: ")
    year = input("Enter the movie release year: ")

    movies.append({
        'title': title,
        'director': director,
        'year': year
    })


def display():
    print("movies =", end =" ")
    for movie in movies:
        print(movie['title'])



def search(title):
    for i in range(len(movies)):
        if(movies[i]['title']== str(title)):
            return movies[i]

    return None

while selection != 'q':
    if selection == "a":
        movie_data()
    elif selection == "l":
        display()
    elif selection == "f":
        find = input("enter the movie title:")
        movie = search(find)
        if (movie):

            print("movie found:", movie)
        else:
            print(f'No Such Movie, Named {find}, Found!, Try Other Movie Name.')
    else:
        print('Unknown command. Please try again.')

    selection = input(MENU_PROMPT)