使用urllib2时出现"TypeError:需要浮动"

Question

我正在关注发布仅应用程序请求的twitter API文档.执行步骤2:获取承载令牌时发生错误.我不熟悉追溯中这些模块的细节,有人能告诉我如何使代码工作吗？

这是我的代码:

import urllib, urllib2, base64

consumer_key = 'KmdCpWGtKEtQ0EdZyQCEZGmcX'
consumer_secret = 'B3I0RcG8vsCC1Y4LBIHIlNvm2NrSB9smlPovYnKYjCyUoNBcMd'
consumer_key_secret = urllib.quote(consumer_key) + ':' + urllib.quote(consumer_secret)
token = base64.b64encode(consumer_key_secret)
headers = {'Authorization': 'Basic ' + token, 'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'}
data = {'grant_type': 'client_credenials'}

resp = urllib2.urlopen('https://api.twitter.com/oauth2/token', urllib.urlencode(data), headers)

错误:

Traceback (most recent call last):
  File "app_only_auth.py", line 12, in <module>
    resp = urllib2.urlopen('https://api.twitter.com/oauth2/token', urllib.urlencode(data), headers)
  File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 400, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 418, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1215, in https_open
    return self.do_open(httplib.HTTPSConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1174, in do_open
    h.request(req.get_method(), req.get_selector(), req.data, headers)
  File "/usr/lib/python2.7/httplib.py", line 958, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib/python2.7/httplib.py", line 992, in _send_request
    self.endheaders(body)
  File "/usr/lib/python2.7/httplib.py", line 954, in endheaders
    self._send_output(message_body)
  File "/usr/lib/python2.7/httplib.py", line 814, in _send_output
    self.send(msg)
  File "/usr/lib/python2.7/httplib.py", line 776, in send
    self.connect()
  File "/usr/lib/python2.7/httplib.py", line 1157, in connect
    self.timeout, self.source_address)
  File "/usr/lib/python2.7/socket.py", line 559, in create_connection
    sock.settimeout(timeout)
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
TypeError: a float is required

Answer 1

urlopen函数使用以下格式:urllib2.urlopen(url [,data] [,timeout])

在您的代码中,您将标题设置为urlopen作为超时值,这会导致您获得TypeError.

应通过使用urllib2.Request()函数创建请求来添加标头.例如:

req = urllib2.Request('https://api.twitter.com/oauth2/token', urllib.urlencode(data), headers)
resp = urllib2.urlopen(req)