python - 根据用户在 Python 3 中选择的链接输入来计算网站中 p 标签 () 的数量

Question

Write a program that asks the user for a URL. It should then retrieve the contents of the page at that URL and print how many <p> tags are on that page. Your program should just print an integer.

这是我的代码:

import urllib.request

link = input('Enter URL: ')
response = urllib.request.urlopen(link)
html = response.read()
counter = 0
for '<p>' in html:
    counter += 1
    print(counter)

但是，我收到了这个错误:

Traceback (most recent call last):

  File "python", line 16

SyntaxError: can't assign to literal

执行此代码的更好方法是什么？我应该使用 find方法代替？

Answer 1

首先response.read()返回字节；因此你需要将其转换为字符串:

html = str(response.read())

那么，不需要for循环，你可以使用 count = html.counter('<p>')

希望有帮助