A single parameter:
@pytest.mark.parametrize('a', [0,1,2,3,4,5])
A plurality of parameters: a plurality of interpreters
@pytest.mark.parametrize('a', [0,1,2,3,4,5])
@pytest.mark.parametrize('b', [A,B,C,D,E])
Mixing parameters: for example, use the login account, password
@pytest.mark.parametrize('a,b',[(0,A),(1,B),(2,C),(3,D),(4,F)])