=================================== FAILURES ===================================
                     ___________________________________ test_two ___________________________________
                     
                         def test_two():
                     >     assert 1 == core.two()
                     E     assert 1 == 2
                     E      +  where 2 = <function two at 0x7fc857821ed8>()
                     E      +    where <function two at 0x7fc857821ed8> = core.two
                     
                     tests/test_core_red.py:5: AssertionError
                     !!!!!!!!!!!!!!!!!!!! Interrupted: stopping after 1 failures !!!!!!!!!!!!!!!!!!!!
                     =========================== 1 failed in 0.09 seconds ===========================