pyassert | Readable assertions framework for Python | Assertion library

class Matcher (object):
    def accepts (self, actual):
        """Returns True if the given actual value is accepted by this matcher."""
        return True

    def matches (self, actual):
        """Returns True if the given actual value matches t  

from pyassert import Matcher, register_matcher

@register_matcher("matches_my_matcher")
@register_matcher("does_not_match_my_matcher", negated=True)
class MyMatcher (Matcher):
    ...

@register_matcher("is_empty")
@register_negated_matcher("is_not_e