def check(self, instance, format):

        if format not in self.checkers:
            return

        func, raises = self.checkers[format]
        result, cause = None, None
        try:
            result = func(instance)
        except raises as e:
            cause = e
        if not result:
            raise FormatError(
                "%r is not a %r" % (instance, format), cause=cause,
            )
List source code for the current file
dataset/ETHPy150Open Julian/jsonschema/jsonschema/_format.py/FormatChecker.check--crossover with--dataset/ETHPy150Open uwdata/termite-data-server/web2py/gluon/contrib/qdb.py/Frontend.do_list