How to use 'python program to add two numbers using function' in Python

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def add_numbers():
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    """
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    Basic approximation of all known explicit number expressions.
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    Handles:
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        fractions (quarter/half)
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        cardinal numbers <1, 59>
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    """
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    for fraction, fraction_spelling in [(0.25, 'quarter'), (0.5, 'half')]:
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        add_db_number(fraction, fraction_spelling)
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    for cardinal in xrange(60):
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        add_db_number(cardinal, spell_number(cardinal))
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    for single_digit in xrange(9):
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        add_db_number(single_digit, "zero " + spell_number(single_digit))
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        add_db_number(single_digit, "o " + spell_number(single_digit))

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def two_arg_function(name: str, num: float = 0.0) -> None:
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    print(f"Sorry {name}, this function won't return {num}")