py.test - custom assert in pytest should overrule standard assert -

i wrote custom assert function compare items in 2 lists such order not important, using pytest_assertrepr_compare. works fine , reports failure when content of lists differ.

however, if custom assert passes, fails on default '==' assert because item 0 of 1 list unequal item 0 of other list.

is there way prevent default assert kick in?

assert ['a', 'b', 'c'] == ['b', 'a', 'c'] # custom assert passes                                            # default assert fails 

the custom assert function is:

def pytest_assertrepr_compare(config, op, left, right):     equal = true     if op == '==' , isinstance(left, list) , isinstance(right, list):         if len(left) != len(right):             equal = false         else:             l in left:                 if not l in right:                     equal = false         if equal:             r in right:                 if not r in left:                     equal = false     if not equal:         return ['comparing lists:',                 '   vals: %s != %s' % (left, right)] 

i found easiest way combinate py.test & pyhamcrest. in example easy use contains_inanyorder matcher:

from hamcrest import assert_that, contains_inanyorder  def test_first():     assert_that(['a', 'b', 'c'], contains_inanyorder('b', 'a', 'c'))