def add_pop_key_list(self, key):
    '\n        Add a external file unit number to a list that will be used to remove\n        model output (typically binary) files from ext_unit_dict.\n\n        Parameters\n        ----------\n        key : int\n            file unit number\n\n        Returns\n        -------\n\n        Examples\n        --------\n\n        '
    if (key not in self.pop_key_list):
        self.pop_key_list.append(key)
Add a external file unit number to a list that will be used to remove
model output (typically binary) files from ext_unit_dict.

Parameters
----------
key : int
    file unit number

Returns
-------

Examples
--------
def add_pop_key_list(self, key):
    '\n        Add a external file unit number to a list that will be used to remove\n        model output (typically binary) files from ext_unit_dict.\n\n        Parameters\n        ----------\n        key : int\n            file unit number\n\n        Returns\n        -------\n\n        Examples\n        --------\n\n        '
    if (key not in self.pop_key_list):
        self.pop_key_list.append(key)