Python mempty Examples

Example #1

def test_monoid_law_right_identity(m):
    # a + mempty = a
    assert tc.mappend(m, tc.mempty(m)) == m

Example #2

File: test_maybe.py Project: yetone/python-lenses

def test_Just_add_monoid_empty():
    obj = object()
    value = Just(obj)
    assert value + mempty(value) == value

Example #3

def test_monoid_law_left_identity(m):
    # mempty + a = a
    assert tc.mappend(tc.mempty(m), m) == m

Example #4

def test_monoid_law_right_identity(monoids):
    # a + mempty = a
    monoid = monoids[0]
    assert tc.mappend(monoid, tc.mempty(monoid)) == monoid

Example #5

def test_monoid_law_left_identity(monoids):
    # mempty + a = a
    monoid = monoids[0]
    assert tc.mappend(tc.mempty(monoid), monoid) == monoid

Example #6

File: test_typeclass_laws.py Project: ingolemo/python-lenses

def test_monoid_law_left_identity(monoids):
    # mempty + a = a
    monoid = monoids[0]
    assert tc.mappend(tc.mempty(monoid), monoid) == monoid

Example #7

File: test_typeclass_laws.py Project: ingolemo/python-lenses

def test_monoid_law_right_identity(monoids):
    # a + mempty = a
    monoid = monoids[0]
    assert tc.mappend(monoid, tc.mempty(monoid)) == monoid