# Self-checking test. # Mixed boolean expresions b = True assert b, 'b = True' c = False assert not c, 'c = False' d = True a = b and c or d assert a, 'b and c or d' a = (b or c) and d assert a, '(b or c) and d' a = b or c or d assert a, 'b or c or d' a = b and c and d assert not a, 'b and c and d' a = b or c and d assert a a = b and (c or d) assert a a = b and c or d assert a a = (b or c and d) and b assert a a = (b or c and d or a) and b assert a