Python3 Code:

check_pwd accepts a string and returns a boolean: True if it meets the criteria listed below, otherwise returns False:

Must be between 8 and 20 characters (inclusive)

Must contain at least one lowercase letter (standard English alphabet)

Must contain at least one uppercase letter (standard English alphabet)

Must contain at least one digit

Must contain at least one symbol from: ~`!@#$%^&*()_+-=

These are the only permitted symbols

You may assume that only strings will be sent to the check_pwd.