1 science = {}

     2 

     3 for record in open('sslc1.txt'):

     4     record = record.strip()

     5     fields = record.split(';')

     6 

     7     region_code = fields[0].strip()

     8 

     9     score_str = fields[6].strip()

    10 

    11     score = int(score_str) if score_str != 'AA' else 0

    12 

    13     if score > 90:

    14         science[region_code] += 1

    15 

    16 figure(1)

    17 pie(science.values(), labels=science.keys())

    18 title('Students scoring 90% and above in science by region')

    19 savefig('/tmp/science.png')

    20