eab2da81c65974e08b8245bbf8a052093f972df3,Pysb.py,Rule,__init__,#Rule#Any#Any#Any#Any#,287

Before Change

        SelfExporter.__init__(self, name)

        if isinstance(reactants, MonomerPattern):
            reactants = [reactants]
        if isinstance(products, MonomerPattern):
            products = [products]

        if not all([isinstance(r, MonomerPattern) for r in reactants]):
            raise Exception("Reactants must all be MonomerPatterns")
        if not all([isinstance(p, MonomerPattern) for p in products]):
            raise Exception("Products must all be MonomerPatterns")
        if not isinstance(rate, Parameter):
            raise Exception("Rate must be a Parameter")

After Change

        if not isinstance(reaction_pattern_set, tuple) and len(reaction_pattern_set) != 3:
            raise Exception("reaction_pattern_set must be a tuple of (ReactionPattern, ReactionPattern, Boolean)")

        try:
            reactant_pattern = as_reaction_pattern(reaction_pattern_set[0])
        except InvalidReactionPatternException as e:
            raise type(e)("Reactant does not look like a reaction pattern")

        try:
            product_pattern = as_reaction_pattern(reaction_pattern_set[1])
        except InvalidReactionPatternException as e:
            raise type(e)("Product does not look like a reaction pattern")

Instances