How does this flowchart to compare functions work? The highlighted ones are the start of the codes

def unicode_sum(word):

"""Calculates the sum of the unicode values

of the individual characters in the word

Args:

str: the word to process

Returns:

int: the sum of the unicode values of characters in the word

Examples:

>>> unicode_sum('hello')

532

>>> unicode_sum('world')

552

"""

def compare(a,b):

'''Compares two integers operands

Args:

int: first operand in the comparison

int: second operand in the comparison

Returns:

int: 1 if the first operand is greater, -1 if the second is greater, 0 if equal

Examples:

>>> compare(10,20)

-1

>>> compare(20,15)

1

>>> compare(1,1)

0

'''

def process_inputs(operands, criterion='length'):

'''Processes the inputs and determines the outcome

of comparing two words based on the provided criterion

Args:

tuple(str, str): the strings to compare

str: the criterion for comparison, i.e. length or unicode

defaults to length

Returns:

tuple: A single-item tuple containing the greater word

or a two-item tuple containing the two words if equal

Examples:

>>> compare(('hello', 'world'))

('hello','world')

>>> compare(('hello', 'world'), 'unicode')

('world',)

>>> compare(('hello', 'HELLO'), 'unicode')

('hello',)

'''

def main():

'''Main program logic

Asks the user to enter two words to compare

and the comparison criterion

Prints a message declaring which of the two words is greater,

otherwise declares them equal

'''

if __name__ == '__main__':

main()