def _createInitialBindings(pattern):
    bindings = {}
    for c in pattern.unbounds:
        bindings[c] = None

    return bindings
Creates an initial binding directory for the :class:`~rdfextras.sparql.graph.GraphPattern`
dataset/ETHPy150Open RDFLib/rdfextras/rdfextras/sparql/query.py/_createInitialBindings