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这段代码可以工作，但我不是 100% 确定它是如何工作的，就像我借来的 Python 书一样。我不明白该程序如何检查某些内容是否为多字。还有星号线是什么意思

places= ["Home","In-n Out Burger", "John's house", "Santa Monica Pier", "Staples center",  "LA Dodgers stadium", "Home"]
def placesCount(places):
    multi_word = 0
    count = 0
    **while True:
        place = places[count]**
        if place == 'LA Dodgers stadium':
            break
        **if ' ' in place:**
            multi_word += 1
        count += 1
    return count + 1, multi_word + 1

placesCount(places)
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1 回答 1

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The method checks if a string in the list places has a space, it considers that a multi-word.

If the list places contains the string LA Dodgers stadium, the method will return the position of the string, plus a count of how many multiple words were found before it.

Here's a hint: What happens when you pass in ['LA Dodgers stadium'] to the function? Does it return the correct numbers?

def placesCount(places):
    multi_word = 0 # a count of how many multiple words were found
    count = 0 # an initializer (not needed in Python)
    while True: # start a while loop
        place = places[count] # get the object from the places list
                              # at position count
        if place == 'LA Dodgers stadium':
            # quit the loop if the current place equals 'LA Dodgers stadium' 
            break
        if ' ' in place:
            # If the current string from the places list
            # (which is stored pointed to by the name place)
            # contains a space, add one to the value of multi_word
            multi_word += 1
        # Add one to count, so the loop will pick the next object from the list
        count += 1
    # return a tuple, the first is how many words in the list
    # and the second item is how many multiple words (words with spaces)
    return count + 1, multi_word + 1
于 2013-10-09T04:33:53.757 回答