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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 plot(self):
 """An object to visualize this data object To make a 2D-plot with the :mod:`psy-simple <psy_simple.plugin>` plugin, you can just type .. code-block:: python plotter = da.psy.plot.plot2d() It will create a new :class:`psyplot.plotter.Plotter` instance with the extracted and visualized data. See Also -------- psyplot.project.DataArrayPlotter: for the different plot methods"""

        if self._plot is None:
            import psyplot.project as psy
            self._plot = psy.DataArrayPlotter(self)
        return self._plot