def __init__(self, schema=None, domain=None, range=None):
        if schema and domain and range:
            if domain not in schema:
                schema += domain #ADD DOMAIN AS NODE TO schema GRAPH
            schema[domain][range] = self
        self.dictClass.__init__(self) # INITIALIZE TOPLEVEL DICTIONARY
dataset/ETHPy150Open cjlee112/pygr/pygr/mapping.py/dictGraph.__init__/original