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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 remove_diff(self, diff_key=None, diff_list='intersect'):
        '''Deletes an attribute from all of the intersect objects'''
        if diff_list == 'intersect':
            for item in self._intersect:
                item['old'].pop(diff_key, None)
                item['new'].pop(diff_key, None)
        if diff_list == 'removed':
            for item in self._removed:
                item.pop(diff_key, None)