Matching pushpool difficulty with stratum's
This is how you change the difficulty in Stratum:

go to mining/subscription.py

change

self.connection_ref().rpc('mining.set_difficulty', [16,], is_notification=True)


to

self.connection_ref().rpc('mining.set_difficulty', [32,], is_notification=True)


That will set the difficulty to 32 - or change to whatever value you want.