def substring(self, start, stop):

        raise NotImplementedError
Constructs a regular cartesian grid
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/antlr3/antlr3/streams.py/CharStream.substring--crossover with--dataset/ETHPy150Open QuantEcon/QuantEcon.py/quantecon/gridtools.py/mlinspace