geodata.Dataset.datasetfn
=========================

.. py:method:: geodata.Dataset.datasetfn(fn, *args)

   Construct file name from template function in `weather_data_config` and args (yr, mo, day)

   :param fn: Template function in `weather_data_config`
   :type fn: str
   :param \*args: Year, month, day

   :returns: File name
   :rtype: str