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chr() and ord()

Code sample link: https://replit.com/@justinjoco/python-chr-ord

These utility functions are useful for coverting unicode characters to and from their code point values. This table contains some, but not all, of the character-code point mappings: https://www.rapidtables.com/code/text/ascii-table.html

chr

The chr function takes an integer argument and returns the appropriate unicode character for that number. 

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chr(61) == '='
chr(100) == 'd'
chr(101) == 'e'
chr(102) == 'f'
chr(103) == 'g'

ord

The ord function takes a unicode string argument and returns the corresponding code point value. 

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ord("(") == 40
ord("<") == 60
ord("A") == 65
ord("9") == 57

Convert a lowercase letter to an index between 0 and 25, inclusive

Use the statement ord(char) - ord("a") 

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ord("a") - ord("a") == 0
ord("z") - ord("a") == 25
ord("d") - ord("a") == 3
ord("j") - ord("a") == 9