TypeError on login: cannot make memory view

[tobiasvl]

I can no longer login using PRAW 3.3.0.

Using username/password:

Traceback (most recent call last):
  File "countdown.py", line 25, in update_countdown
    reddit.login(username, password)
  File "<decorator-gen-49>", line 2, in login
  File "/usr/lib/python2.7/site-packages/praw/decorators.py", line 75, in wrap
    return function(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/praw/__init__.py", line 1418, in login
    self.request_json(self.config['login'], data=data)
  File "<decorator-gen-8>", line 2, in request_json
  File "/usr/lib/python2.7/site-packages/praw/decorators.py", line 113, in raise_api_exceptions
    return_value = function(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/praw/__init__.py", line 612, in request_json
    retry_on_error=retry_on_error)

Using OAuth:

Traceback (most recent call last):
  File "countdown.py", line 25, in update_countdown
    reddit.refresh_access_information(access_info)
  File "/usr/lib/python2.7/site-packages/praw/__init__.py", line 1311, in get_access_information
    retval = super(AuthenticatedReddit, self).get_access_information(code)
  File "<decorator-gen-9>", line 2, in get_access_information
  File "/usr/lib/python2.7/site-packages/praw/decorators.py", line 285, in require_oauth
    return function(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/praw/__init__.py", line 675, in get_access_information
    retval = self._handle_oauth_request(data)
  File "/usr/lib/python2.7/site-packages/praw/__init__.py", line 650, in _handle_oauth_request
    response = self._request(url, auth=auth, data=data, raw_response=True)

The rest of the traceback is common to both methods:

  File "/usr/lib/python2.7/site-packages/praw/__init__.py", line 444, in _request
    response = handle_redirect()
  File "/usr/lib/python2.7/site-packages/praw/__init__.py", line 425, in handle_redirect
    verify=self.http.validate_certs, **kwargs)
  File "/usr/lib/python2.7/site-packages/praw/handlers.py", line 136, in wrapped
    return function(cls, **kwargs)
  File "/usr/lib/python2.7/site-packages/praw/handlers.py", line 57, in wrapped
    return function(cls, **kwargs)
  File "/usr/lib/python2.7/site-packages/praw/handlers.py", line 103, in request
    allow_redirects=False, verify=verify)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 576, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/adapters.py", line 370, in send
    timeout=timeout
  File "/usr/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py", line 559, in urlopen
    body=body, headers=headers)
  File "/usr/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py", line 353, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/usr/lib64/python2.7/httplib.py", line 1053, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib64/python2.7/httplib.py", line 1093, in _send_request
    self.endheaders(body)
  File "/usr/lib64/python2.7/httplib.py", line 1049, in endheaders
    self._send_output(message_body)
  File "/usr/lib64/python2.7/httplib.py", line 893, in _send_output
    self.send(msg)
  File "/usr/lib64/python2.7/httplib.py", line 869, in send
    self.sock.sendall(data)
  File "/usr/lib/python2.7/site-packages/requests/packages/urllib3/contrib/pyopenssl.py", line 216, in sendall
    data = memoryview(data)
TypeError: cannot make memory view because object does not have the buffer interface

[tobiasvl]

After some digging it seems to me that this is related to kennethreitz/requests#2818 (and urllib3/urllib3#717).

[13steinj]

Can you use pip to see what version of requests you are using?

[bboe]

Sounds like we either need to restrict the version of requests that can be used (set a smaller maximum number), or fix the unicode headers that PRAW sends. The former approach is much simpler.

[tobiasvl]

I used 2.8.0, but it works when I downgraded requests to 2.7.0.