gcm = GCM(API_KEY)
    data = {'param1': 'value1', 'param2': 'value2'}
    
    # Plaintext request
    reg_id = '12345'
    res = gcm.plaintext_request(registration_id=reg_id, data=data)

    # JSON request
    reg_ids = ['12', '34', '69']
    res = gcm.json_request(registration_ids=reg_ids, data=data)

    # Extra arguments
    res = gcm.json_request(
        registration_ids=reg_ids, data=data,
        collapse_key='uptoyou', delay_while_idle=True, time_to_live=3600
    )

    # Handle responses. This raises exceptions when GCM servers return errors 
    gcm.handle_response(res)