human
Solve the following python programming problem given the following code:
@ property 
def _report_columns(self) : 
    def _make_column(conf, index) : 
        return { 
            'format' : 'default', 
            'aggregation' : 'simple', 
            'field' : self.data_source_properties [conf ['property']].column_id, 
            'column_id' : 'column_{}'.format (index), 
            'type' : 'field', 
            'display' : conf ['display_text'], 
} 
return [_make_column (conf, i) for (i, conf) in enumerate (_make_column.cleaned_data ['columns'])] 

    
    

    Fix the buggy line: return [_make_column (conf, i) for (i, conf) in enumerate (_make_column.cleaned_data ['columns'])]
assistant
#Here is Python code to fix the buggy line: return [_make_column (conf, i) for (i, conf) in enumerate (_make_column.

return [_make_column (conf, i) for (i, conf) in enumerate (self.cleaned_data ['columns'])]