def __init__(self, variable, set):
BasicConstraint.__init__(self, variable, set, _in )
def __init__(self, variable):
BasicConstraint.__init__(self, variable, None, None)
def __init__(self, variable, reference):
BasicConstraint.__init__(self, variable, reference, operator.ge)
def __init__(self,variable):
BasicConstraint.__init__(self,variable,None,None)
