在函数内重复 for 循环 Python 3

Question

几天来，我一直在为 Python class 的编程介绍解决这个问题。目标是创建一个程序，从 user-inputed 个单词的列表中生成随机电影标题。输出应如下所示：

Please enter a list of words: ["Space", "Show", "Adventure", "Story", 
"Love", "Wild", "Life"]

Please enter a number of movies you'd like to generate: 3

输出：

Welcome to Randoplex! Currently playing movies are:

Adventure Life Space

Show Love Story

Wild Space Life

我已经能够生成随机标题，但无论如何找不到根据 user-inputed 数字生成不同的标题。这是我得到的最接近的：

import random

def random_movies(word_list = eval(input("Please enter a list of words:"))):

    for word in word_list:
        titles = ' '.join(random.choice(word_list) for i in range(3))
    return titles

def repeat():

  titles = random_movies()
  movie_num = eval(input("Please enter the number of movies you'd like to  generate:"))

 for i in range(movie_num):
    random_movies()
    print(titles)

titles1 = repeat()
print("Welcome to Randoplex! Currently playing movies are:")
print()
print(titles1)

这允许我为用户输入的值 movie_num 打印相同的随机标题。但是，我就是不知道如何创建多个不同的随机电影片名。我尝试过以多种不同方式使用 range() 函数，并在 Internet 上到处寻找建议。我真的不知道在这一点上还能尝试什么，任何帮助将不胜感激。值得一提的是，我的 class 非常初级，我们还没有被介绍过“while”循环，因此我不认为我被允许使用它们。提前谢谢你。

Answer 1

您的函数工作正常，但是在打印电影片名的 for 循环中，您忘记将变量重新分配给新生成的电影片名。您生成了不同的标题，但您只打印了第一个。

import random

def random_movie(word_list = eval(input("Please enter a list of words:"))):
    for word in word_list:
        title = ' '.join(random.choice(word_list) for i in range(3))
        return title

def repeat():
    movie_num = eval(input("Please enter the number of movies you'd like to  generate:"))
    for i in range(movie_num):
        title = random_movie()
        print(title)

print("Welcome to Randoplex! Currently playing movies are: ")
print()
repeat()

Answer 2

这是否符合您的要求？

import random

def random_movies(word_list):
    for word in word_list:
        titles = ' '.join(random.choice(word_list.split()) for i in range(3))
        return titles

word_list = input("Please enter a list of words:")
movie_num = int(input("Please enter the number of movies you'd like to  generate:"))

print("Welcome to Randoplex! Currently playing movies are:")

for i in range(movie_num):
    print(random_movies(word_list))

Answer 3

实现类似结果的另一种方法。

import itertools
import random
noofmovies = 3
movies =  ["Space", "Show", "Adventure", "Story", "Love", "Wild", "Life"]
newmovies = []
def random_movie(movies):

    for r in range(2,len(movies)):
        for elem in itertools.combinations(movies, r):
            newmovies.append(" ".join(elem))


def repeat():
    random.shuffle(newmovies)
    for elem in newmovies[0:noofmovies]:
        print (elem)


print("Welcome to Randoplex! Currently playing movies are: ")
random_movie(movies)
repeat()

输出：

Show Adventure Story Wild Life
Story Wild Life
Show Adventure Story Love Wild Life

如果您只想始终连接 3 个电影名称，请删除 for r in range(2,len(movies)): loop 并将 r 硬编码为 3

在函数内重复 for 循环 Python 3

Repeating for loop within a function Python 3

python

random

for-loop

repeat