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first_name = "Zaphod"

def hello(name):
    """Say hello"""
    print "Hello, {}".format(name)

def hello_multi(name, greeting_mult=1):
    """Say hello gratuitously"""
    greeting_count = 3 * greeting_mult
    for num in range(greeting_count):
        hello(name)


    

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hello(first_name)


    

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hello_multi(first_name, 3)


    

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# optional arguments
hello_multi(first_name)


    

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# keyword arguments
hello_multi(first_name, greeting_mult=2)


    

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%xmode plain
# fail, missing required argument
hello_multi(greeting_mult=2)