human
Solve the following python programming problem given the following code:
def _chart_data(self, chart, rows) : 
    def p2f(column) : 
        return (float (column ['html'].strip ('%')) / 100.0) 
if rows : 
        charts = [[], [], []] 
        for row in rows : 
            group_name = chart [0] 
            total = sum (row [1 :]) 
            total = (float (total) if total else 1.0) 
            for (ix, column) in enumerate (row [1 :]) : 
                charts [ix].append ({ 
                    'x' : group_name, 
                    'y' : (float (column) / total), 
}) 
chart.add_dataset ('None', charts [0], 'red') 
        chart.add_dataset ('Some', charts [1], 'yellow') 
        chart.add_dataset ('All', charts [2], 'green') 

    
    

    Fix the buggy line: group_name = chart [0]
assistant
#Here is Python code to fix the buggy line: group_name = chart [0]
.

group_name = row [0]