def show(self, argv):
        if len(argv) > 1:
            v = getattr(self._obj, argv[1])
            self._print(v)
            return v
        else:
            self._print(self._obj)
Function which reads <gml:Polygon> and returns its area.
dataset/ETHPy150Open kdart/pycopia/fepy/pycopia/fepy/CLI.py/GenericCLI.show--crossover with--dataset/ETHPy150Open tudelft3d/CityGML2OBJs/polygon3dmodule.py/getAreaOfGML