r = requests.get('www.baidu.com')
r.request.headers
{'User-Agent': 'python-requests/2.18.4', 'Accept-Encoding': 'gzip, deflate', 'Accept': '*/*', 'Connection': 'keep-alive'}
#获取头部信息
kv = {'user-agent':'Mozilla/5.0'}
r = requests.get('www.baidu.com',headers=kv)
#修改headers的agent
r.status_code
200
#状态200为正常
kv = {'wd':'python'}
r = requests.get('http://www.baidu.com/s',params = kv)
#params相当在url后加字符串,注意kv字典的构成
r.encoding = r.apparent_encoding#备选编码方式