Fix for #575

Fix no pydrive dependency installed
Fix sending email on python3

cps/templates/stats.html

@@ -34,7 +34,7 @@
     </tr>
   </thead>
   <tbody>
-  {% for library,version in versions.iteritems() %}
+  {% for library,version in versions.items() %}
     <tr>
       <th>{{library}}</th>
       <td>{{version}}</td>

cps/web.py

@@ -2785,7 +2785,7 @@ def configuration_helper(origin):
             app.logger.info('Reboot required, restarting')
         if origin:
             success = True
-    if is_gdrive_ready():
+    if is_gdrive_ready() and gdrive_support == True:
         gdrivefolders=gdriveutils.listRootFolders()
     else:
         gdrivefolders=None

cps/worker.py

@@ -112,12 +112,15 @@ class email(smtplib.SMTP):
                     self.transferSize = len(strg)
                     lock.release()
                     for i in range(0, self.transferSize, chunksize):
-                        self.sock.send(strg[i:i+chunksize])
+                        if type(strg) == bytes:
+                            self.sock.send((strg[i:i+chunksize]))
+                        else:
+                            self.sock.send((strg[i:i + chunksize]).encode('utf-8'))
                         lock.acquire()
                         self.progress = i
                         lock.release()
                 else:
-                    self.sock.sendall(strg)
+                    self.sock.sendall(strg.encode('utf-8'))
             except socket.error:
                 self.close()
                 raise smtplib.SMTPServerDisconnected('Server not connected')