code: def upload_encoded(self, photo_file, **kwds):
          
          with open(photo_file, "rb") as in_file:
              encoded_photo = base64.b64encode(in_file.read())
          result = self._client.post("/photo/upload.json", photo=encoded_photo,
                                     **kwds)["result"]
          return Photo(self._client, result)
docs: Endpoint: /photo/upload.json
  
          Base64-encodes and uploads the specified photo filename.