def __init__(self, low, high):
        """ Set initial bound of the range object. """
        if isnan(low):
            low = -float('inf')
        if isnan(high):
            high = +float('inf')
        self._low = low
        self._high = high
def __init__ ( self , low , high ) : if isnan ( low ) : low = - float ( 'inf' ) if isnan ( high ) : high = + float ( 'inf' ) self . _low = low self . _high = high
Set initial bound of the range object.