PythonExtra/tests/basics/subclass_native_cmp.py

# Test calling non-special method inherited from native type

class mytuple(tuple):
    pass

t = mytuple((1, 2, 3))
print(t)
print(t == (1, 2, 3))
print((1, 2, 3) == t)

print(t < (1, 2, 3), t < (1, 2, 4))
print((1, 2, 3) <= t, (1, 2, 4) < t)
objtuple: Go out of the way to support comparison of subclasses. Two things are handled here: allow to compare native subtypes of tuple, e.g. namedtuple (TODO: should compare type too, currently compared duck-typedly by content). Secondly, allow user sunclasses of tuples (and its subtypes) be compared either. "Magic" I did previously in objtype.c covers only one argument (lhs is many), so we're in trouble when lhs is native type - there's no other option besides handling rhs in special manner. Fortunately, this patch outlines approach with fast path for native types. 2014-05-11 02:16:04 +02:00			`# Test calling non-special method inherited from native type`

			`class mytuple(tuple):`
			`pass`

			`t = mytuple((1, 2, 3))`
			`print(t)`
			`print(t == (1, 2, 3))`
			`print((1, 2, 3) == t)`
tests/basics: Add test for tuple compare with class derived from tuple. Only the "==" operator was tested by the test suite in for such arguments. Other comparison operators like "<" take a different path in the code so need to be tested separately. 2020-02-18 12:44:05 +01:00
			`print(t < (1, 2, 3), t < (1, 2, 4))`
			`print((1, 2, 3) <= t, (1, 2, 4) < t)`