def getDbfField(self):
        return self.cls(self.name, self.len, self.dec)
Gets the shard number from the key name.
dataset/ETHPy150Open kennethreitz/tablib/tablib/packages/dbfpy3/dbfnew.py/_FieldDefinition.getDbfField--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/model.py/ShardState.get_shard_number