Question

所以我正在编写一个小游戏，我正在尝试做一些我不明白该怎么做的事情。我已经定义了一个函数，当代码工作的条件都没有时，我希望它返回到另一行代码。但我不明白怎么做。这是我正在努力的代码的一部分

print "What's your favourite type of pokemon?"

fav_type = raw_input()

def chosen_pokemon():
    if "fire" in fav_type:
         print "So you like fire types? I'll give you a chimchar!"
    elif "water" in fav_type:
         print "So you like water types? I'll give you a piplup!"
    elif "grass" in fav_type:
         print "So you like grass types? I'll give you a turtwig!"
    else:
         print "sorry, you can only choose grass, water or fire"
         start()

chosen_pokemon()

就像我希望代码回到“你最喜欢的哪种口袋妖怪？”如果它最终由其他人，但如何？在回答时请尽可能清楚，因为我刚刚开始学习编程，而我几乎一无所知

Answer 1

您可以将raw_input步骤置于while循环中，只有在收到有效响应时才退出。我添加了几条评论来解释发生了什么。

def chosen_pokemon():
    while True: # repeat forever unless it reaches "break" or "return"
        print "What's your favourite type of pokemon?"
        fav_type = raw_input()
        if "fire" in fav_type:
             print "So you like fire types? I'll give you a chimchar!"
        elif "water" in fav_type:
             print "So you like water types? I'll give you a piplup!"
        elif "grass" in fav_type:
             print "So you like grass types? I'll give you a turtwig!"
        else:
             print "sorry, you can only choose grass, water or fire"
             continue # jumps back to the "while True:" line
        return # finished; exit the function.

chosen_pokemon()

输出：

>>> chosen_pokemon()
What's your favourite type of pokemon?
yellow
sorry, you can only choose grass, water or fire
What's your favourite type of pokemon?
grass
So you like grass types? I'll give you a turtwig!
>>>

这是关于while循环的教程。 http://www.tutorialspoint.com/python/python_while_loop.htm

Answer 2

def chosen_pokemon(inp):
    if "fire" in inp:
        print "So you like fire types? I'll give you a chimchar!"
        return True
    elif "water" in inp:
        print "So you like water types? I'll give you a piplup!"
        return True
    elif "grass" in inp:
        print "So you like grass types? I'll give you a turtwig!"
        return True
    else:
        print "sorry, you can only choose grass, water or fire"
        return False

print "What's your favourite type of pokemon?"
while(True):
   if(chosen_pokemon(raw_input())):
       break

修改您还可以将您的回复放在字典中，以避免使用if-else-clause;

print "What's your favourite type of pokemon?" dic = {"fire":"So you like fire types? I'll give you a chimchar!", \ "water":"So you like water types? I'll give you a piplup!", \ "grass":"So you like grass types? I'll give you a turtwig!"} while(True): d = raw_input() if d in dic: print dic[d] break else: print "sorry, you can only choose grass, water or fire"

Answer 3

你只需要将你拥有的东西放到另一个返回顶部的循环中，然后再次询问问题，直到收到有效的答案。

Answer 4

我是Python的新手。而不是使用循环，我使用递归来解决这个问题，在 else 语句

块中调用 chosen_pokemon （）本身

def chosen_pokemon():
    print "What's your favourite type of pokemon?"

    fav_type = raw_input()
    if "fire" in fav_type:
         print "So you like fire types? I'll give you a chimchar!"
    elif "water" in fav_type:
         print "So you like water types? I'll give you a piplup!"
    elif "grass" in fav_type:
         print "So you like grass types? I'll give you a turtwig!"
    else:
         print "sorry, you can only choose grass, water or fire. Try again"
         chosen_pokemon()

chosen_pokemon()

我希望这个解决方案可以帮助你们。

循环回到代码中的特定点

4 个答案: