python openurl 方法中的 read().decode('utf-8') 后 HttpResponseObject 是否发生变化？

Question

我目前正在学习 python 3，当我注意到在 read().decode('utf-8') 之后我的 HTTP 响应对象的长度变为零并且我不能弄清楚为什么它会这样。

story = urlopen('http://sixty-north.com/c/t.txt')
print(story.read().decode('utf-8'))
story_words = []
for line in story:
    line_words = line.decode('utf-8').split()
    for word in line_words:
        story_words.append(word)
story.close()
print(story_words)

在第 2 行执行打印命令时，story 中 HTTP 响应的长度从 593 变为 0，并且在 story 单词上打印一个空数组。如果我删除打印命令，则会填充 story_words 数组。

Output with read().decode()
It was the best of times
it was the worst of times
it was the age of wisdom
it was the age of foolishness
it was the epoch of belief
it was the epoch of incredulity
it was the season of Light
it was the season of Darkness
it was the spring of hope
it was the winter of despair
we had everything before us
we had nothing before us
we were all going direct to Heaven
we were all going direct the other way
in short the period was so far like the present period that some of
its noisiest authorities insisted on its being received for good or for
evil in the superlative degree of comparison only
[]

Output without it - 

['It', 'was', 'the', 'best', 'of', 'times', 'it', 'was', 'the', 'worst', 'of', 'times', 'it', 'was', 'the', 'age', 'of', 'wisdom', 'it', 'was', 'the', 'age', 'of', 'foolishness', 'it', 'was', 'the', 'epoch', 'of', 'belief', 'it', 'was', 'the', 'epoch', 'of', 'incredulity', 'it', 'was', 'the', 'season', 'of', 'Light', 'it', 'was', 'the', 'season', 'of', 'Darkness', 'it', 'was', 'the', 'spring', 'of', 'hope', 'it', 'was', 'the', 'winter', 'of', 'despair', 'we', 'had', 'everything', 'before', 'us', 'we', 'had', 'nothing', 'before', 'us', 'we', 'were', 'all', 'going', 'direct', 'to', 'Heaven', 'we', 'were', 'all', 'going', 'direct', 'the', 'other', 'way', 'in', 'short', 'the', 'period', 'was', 'so', 'far', 'like', 'the', 'present', 'period', 'that', 'some', 'of', 'its', 'noisiest', 'authorities', 'insisted', 'on', 'its', 'being', 'received', 'for', 'good', 'or', 'for', 'evil', 'in', 'the', 'superlative', 'degree', 'of', 'comparison', 'only']

Answer 1

正在调用 urlopen returns 类文件缓冲区对象。使用 read 您可以获得最多多个字节的响应，或者在不传递参数时获得直到 EOF 的整个响应。读取后，缓冲区为空。这意味着您需要在打印之前将返回值保存在一个变量中。

python openurl 方法中的 read().decode('utf-8') 后 HttpResponseObject 是否发生变化？

Does HttpResponseObject change after read().decode('utf-8') in python openurl method?

python

httpresponse

python-3.6