Question

有人可以向我解释一下吗？此函数获取一个字符串并计算每个单词的出现频率，然后返回带有单词频率的字典。我不明白字典是如何获取数据的。

def count_words(text):
    text = text.split()
    words = {}
    for i in text:
        if i in words:
            words[i] += 1
        else:
            words[i] = 1
    return words

Answer 1

有评论：

def count_words(text):
    # Split the text up into words
    text = text.split()

    # Initialise an empty dictionary
    words = {}

    # For each word in the text
    for i in text:
        # If we already have the word in our dictionary, add 1 to the counter
        if i in words:
            words[i] += 1
        # Otherwise, add the word to our dictionary with the counter 1
        else:
            words[i] = 1
    # Return the dictionary of words and counts
    return words

Answer 2

数据来自自变量文本。

def count_words(text):
    text = text.split()
    words = {}
    for i in text:
        if i in words:
            words[i] += 1
        else:
            words[i] = 1
    return words

因此，当您执行count_words("Hello World")时，您正在为text argument分配“ Hello World”，即成为数据。

另一种方法是在将数据传递给函数调用之前将其分配给变量：

text = "Hello World"  # This is the data
count_words(text)

该词典如何获取数据？

2 个答案: