Compare cuteness

Cthulhu has data on goat cuteness. You can download it. Here's some of the data:

Write a program to compute the average cuteness of goats whose names begin with A-L, and goats whose names begin with M-Z. Do this for valid records only. Validity rules:

• Goat name must be present.
• Cuteness ratings are ints from 0 to 10.

Output:

Write a subset function that works for creating both subsets.

Hints:

• thing[0] is the first character of the string thing.
• a < b < c < d... < l < m ... y < z.
• def get_records_by_name(data_set, low_letter, high_letter):

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