Question

1. Write a function called ordinal_sum that accepts a string argument and returns the sum of the ordinal values of each character in the string. The ordinal value of a character is its numeric Unicode code point in decimal.

2. Write code that creates a Python set containing each unique character in a string named my_string. For example, if the string is 'hello', the set would be {'h', 'e', 'l', 'o'} (in any order). Assign the set to a variable named my_set. Assume that my_string has already been initialized.

3. Write a predicate function called check_list that accepts a list of integers as an argument and returns True if at least half of the values in the list are less than the first number in the list. Return False otherwise.

Answer 1

def ordinal_sum(string):
    total = 0
    for x in string:
        total += ord(x)
    return total

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my_set = set(my_string)

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def check_list(lst):
    first = lst[0]
    count = 0
    for x in lst:
        if x<first:
            count += 1
    return count>=(len(lst)/2)