audio = open('lol.mp3','rb')
a = session_api.docs.getMessagesUploadServer(type='audio_message')
b = requests.post(a['upload_url'], files={'file':audio}).json()
c = session_api.docs.save(file=b['file'])
doc = 'doc%s_%s_%s'%(c['audio_message']['owner_id'],c['audio_message']['id'],c['audio_message']['access_key'])