循环回到代码中的特定点 - python

所以我正在编写一个小游戏，我正在尝试做一些我不知道该怎么做的事情。我已经定义了一个函数，当没有任何条件可以使用该代码时，我希望它返回到另一行代码。但是我不知道该怎么做。这是我正在处理的代码的一部分

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()

就像我希望代码返回到“您最喜欢的神奇宝贝类型是什么？”如果以其他方式结束，但是如何？回答时请尽可能清楚，因为我才刚刚开始学习编程，对此我几乎一无所知

python大神给出的解决方案

您可以使raw_input步骤进入while循环，并且仅在收到有效响应后退出。我添加了一些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!
>>> 

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