我有個問題是這樣的Write the contract, docstring and implementation for a function findActor that takes a movie title and a character's name and returns the actor/actress that played the given character in the given movie. If the given movie or the given character is not found, it prints out an error message and returns an empty string

我已經完成了以下功能，這些功能將有助于實現這一點。myIMDb是一個全局字典，設置為一個空的dic來啟動def addMovie (title, charList, actList):

"""The function addMovie takes a title of the movie, a list of characters,

and a list of actors. (The order of characters and actors match one

another.) The function addMovie adds a pair to myIMDb. The key is the title

of the movie while the value is a dictionary that matches characters to

actors"""

dict2 = {}

for i in range (0, len(charList)):

dict2 [charList[i]] = actList[i]

myIMDb[len(myIMDb)] = {title: dict2}

return myIMDb

def listMovies():

"""returns a list of titles of all the movies in the global variable myIMDb"""

titles = []

for i in range (len(myIMDb)):

titles.append((list(myIMDb[i].keys())))

return titles

這就是我的問題所在。當我想寫findActor函數時，我沒有得到任何可返回的東西。我還沒有完成這個功能，但我認為我做了一些根本性的錯誤。我覺得自己走錯了路，越寫越迷路。這就是我的目的。如有任何關于如何糾正這艘沉船的建議，我們將不勝感激。在

^{pr2}$

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