view roundup/anypy/cmp_.py @ 7800:2d4684e4702d

fix: enhancement to history command output and % template fix. Rather than using the key field, use the label field for descriptions. Call cls.labelprop(default_to_id=True) so it returns id rather than the first sorted property name. If labelprop() returns 'id' or 'title', we return nothing. 'id' means there is no label set and no properties named 'name' or 'title'. So have the caller do whatever it wants (prepend classname for example) when there is no human readable name. This prevents %(name)s%(key)s from producing: 23(23). Also don't accept the 'title' property. Titles can be too long. Arguably we could: '%(name)20s' to limit the title length. However without ellipses or something truncating the title might be confusing. So again pretend there is no human readable name.
author John Rouillard <rouilj@ieee.org>
date Tue, 12 Mar 2024 11:52:17 -0400
parents dec7de56f253
children
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try:
    # will raise TypeError under python 3
    None < 0  # noqa: PLR0133, B015

    def NoneAndDictComparable(v):
        return v
except TypeError:
    # comparator to allow comparisons against None and dict
    # comparisons (these were allowed in Python 2, but aren't allowed
    # in Python 3 any more)
    class NoneAndDictComparable(object):   # noqa: PLW1641
        def __init__(self, value):
            self.value = value

        def __cmp__(self, other):  # noqa: PLW3201, PLR0911
            if not isinstance(other, self.__class__):
                raise TypeError('not comparable')

            if self.value == other.value:
                return 0

            elif self.value is None:
                return -1

            elif other.value is None:
                return 1

            elif type(self.value) is tuple and type(other.value) is tuple:
                for lhs, rhs in zip(self.value, other.value):
                    lhsCmp = NoneAndDictComparable(lhs)
                    rhsCmp = NoneAndDictComparable(rhs)
                    result = lhsCmp.__cmp__(rhsCmp)
                    if result != 0:
                        return result

                return len(self.value) - len(other.value)

            elif type(self.value) is dict and type(other.value) is dict:
                diff = len(self.value) - len(other.value)
                if diff == 0:
                    lhsItems = tuple(sorted(self.value.items(),
                                            key=NoneAndDictComparable))
                    rhsItems = tuple(sorted(other.value.items(),
                                            key=NoneAndDictComparable))
                    return -1 if NoneAndDictComparable(lhsItems) < NoneAndDictComparable(rhsItems) else 1
                else:
                    return diff

            elif self.value < other.value:
                return -1

            else:
                return 1

        def __eq__(self, other):
            return self.__cmp__(other) == 0

        def __ne__(self, other):
            return self.__cmp__(other) != 0

        def __lt__(self, other):
            return self.__cmp__(other) < 0

        def __le__(self, other):
            return self.__cmp__(other) <= 0

        def __ge__(self, other):
            return self.__cmp__(other) >= 0

        def __gt__(self, other):
            return self.__cmp__(other) > 0


def _test():
    # ruff: noqa: S101, B011, PLC0415, PLR2004
    import sys
    _py3 = sys.version_info[0] > 2

    Comp = NoneAndDictComparable

    assert Comp(None) < Comp(0)
    assert Comp(None) < Comp('')
    assert Comp(None) < Comp({})
    assert Comp((0, None)) < Comp((0, 0))
    assert not Comp(0) < Comp(None)
    assert not Comp('') < Comp(None)
    assert not Comp({}) < Comp(None)
    assert not Comp((0, 0)) < Comp((0, None))

    try:
        not Comp("") < Comp((0, None))
        if _py3:
            assert False, "Incompatible types are reporting comparable."
    except TypeError:
        pass

    assert Comp((0, 0)) < Comp((0, 0, None))
    assert Comp((0, None, None)) < Comp((0, 0, 0))

    assert Comp(0) < Comp(1)
    assert Comp(1) > Comp(0)
    assert not Comp(1) < Comp(0)
    assert not Comp(0) > Comp(0)

    assert Comp(0) <= Comp(1)
    assert Comp(1) >= Comp(0)
    assert not Comp(1) <= Comp(0)
    assert Comp(0) >= Comp(0)

    assert Comp({0: None}) < Comp({0: 0})
    assert Comp({0: 0}) < Comp({0: 1})

    assert Comp({0: 0}) == Comp({0: 0})
    assert Comp({0: 0}) != Comp({0: 1})
    assert Comp({0: 0, 1: 1}) > Comp({0: 1})
    assert Comp({0: 0, 1: 1}) < Comp({0: 0, 2: 2})


if __name__ == '__main__':
    _test()

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