1 import urllib.request
2
3 fp = urllib.request.urlopen(r'http://www.baidu.com')
4
5 print(fp.read().decode())     #读取了返回HTML
6
7 fp.close()

1 import urllib.request
2 import urllib.parse
3
4 params = urllib.parse.urlencode({'spam':1,'eggs':2,'bacon':0})
5 url = r'http://www.baidu.com%s'%params
6 with urllib.request.urlopen(url) as f:
7     print(f.read().decode('utf-8'))

1 import urllib.request
2 import urllib.parse
3
4 data = urllib.parse.urlencode({'spam':1,'eggs':2,'bacon':0})
5 data = data.encode('ascii')
6 with urllib.request.urlopen(r'http://www.baidu.com',data) as f:
7     print(f.read().decode('utf-8'))

1 import urllib.request
2
3
4 proxies = {'heet':'http://proxy.example.com:8080/'}
5 opener = urllib.request.FancyURLopener(proxies)
6 with opener.open('http://www.python.ory') as f:
7     f.read().decode('utf-8')

1 import webbrowser
2
3 webbrowser.open('www.baidu.com')

 1 from urllib.parse import urlparse
 2
 3 o = urlparse('http://www.cwi.nl:80/%7Eguido/Python.html')
 4 print(o.port)        #80
 5 print(o.hostname)    #www.cwi.nl
 6
 7 print(o)   #ParseResult(scheme='http', netloc='www.cwi.nl:80', path='/%7Eguido/Python.html', params='', query='', fragment='')
 8
 9 print(urlparse('www.cwi.nl:80/%7Eguido/Python.html'))  #ParseResult(scheme='www.cwi.nl', netloc='', path='80/%7Eguido/Python.html', params='', query='', fragment='')
10
11
12 from urllib.parse import urljoin
13 print(urljoin('http://www.cwi.nl:80/%7Eguido/Python.html','FAQ.html'))   #http://www.cwi.nl:80/%7Eguido/FAQ.html
14 print(urljoin('http://www.cwi.nl:80/%7Eguido/Python.html','//www.python.org/%7Eguido'))   #http://www.python.org/%7Eguido
15
16 from urllib.parse import urlsplit
17 url = r'https://docs.python.org/3/library/urllib.parse.html'
18 r1=urlsplit(url)
19 print(r1)        #SplitResult(scheme='https', netloc='docs.python.org', path='/3/library/urllib.parse.html', query='', fragment='')
20 print(r1.geturl()) #https://docs.python.org/3/library/urllib.parse.html