urllib.parse

官方文档介绍https://docs.python.org/3/library/urllib.parse.html

但其实我们最常用的函数只有几个，

urljoin:

from urllib.parse import urljoin


base = "http://www.baidu.com"
last = "category/html"
urljoin(base,last)
>>>'http://www.baidu.com/category/html'

 quote:

from urllib.parse import quote,unquote


key = "要搜索的关键词"
url_key = quote(key)
url_key
>>>'%E8%A6%81%E6%90%9C%E7%B4%A2%E7%9A%84%E5%85%B3%E9%94%AE%E8%AF%8D'

unquote(url_key)
>>>'要搜索的关键词'