files = {'image': ('photo7.jpg', f)}
r = requests.post(URL, data=data, files=files)


files = {'image': ('photo7.jpg', f.seek(0))}
r = requests.post(URL, data=data, files=files)

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-12-2fd628607687> in <module>()
----> 1 r = requests.post(URL, data=data, files=files)

/home/dev/projects/poster/venv/lib/python2.6/site-packages/requests/api.pyc in post(url, data, **kwargs)
     85     """
     86
---> 87     return request('post', url, data=data, **kwargs)
     88
     89

/home/dev/projects/poster/venv/lib/python2.6/site-packages/requests/api.pyc in request(method, url, **kwargs)
     42
     43     session = sessions.Session()
---> 44     return session.request(method=method, url=url, **kwargs)
     45
     46

/home/dev/projects/poster/venv/lib/python2.6/site-packages/requests/sessions.pyc in request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert)
    274
    275         # Prepare the Request.
--> 276         prep = req.prepare()
    277
    278         # Send the request.

/home/dev/projects/poster/venv/lib/python2.6/site-packages/requests/models.pyc in prepare(self)
    222         p.prepare_headers(self.headers)
    223         p.prepare_cookies(self.cookies)
--> 224         p.prepare_body(self.data, self.files)
    225         # Note that prepare_auth must be last to enable authentication schemes
    226         # such as OAuth to work on a fully prepared request.

/home/dev/projects/poster/venv/lib/python2.6/site-packages/requests/models.pyc in prepare_body(self, data, files)
    367             # Multi-part file uploads.
    368             if files:
--> 369                 (body, content_type) = self._encode_files(files, data)
    370             else:
    371                 if data:

/home/dev/projects/poster/venv/lib/python2.6/site-packages/requests/models.pyc in _encode_files(files, data)
    126                 new_v = (fn, fp.read(), ft)
    127             else:
--> 128                 new_v = (fn, fp.read())
    129             new_fields.append((k, new_v))
    130

AttributeError: 'NoneType' object has no attribute 'read'

In [14]: f
Out[14]: <open file '/tmp/photo7.jpg', mode 'rb' at 0x27c5780>