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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get(self, name, **kwargs):
 """Get the variable given a name if one exists or create a new one if missing. Parameters name : str name of the variable **kwargs : more arguments that's passed to symbol.Variable """

        name = self._prefix + name
        if name not in self._params:
            self._params[name] = symbol.Variable(name, **kwargs)
        return self._params[name]