Automate the boring stuff with Python: Comma Code

Question

Currently working my way through this beginners book and have completed one of the practice projects \'Comma Code\' which asks the user to construct a program which:

Answer 1

As it was not mentioned, here's an answer with f string, for reference:

def list_things(my_list):
    print(f'{", ".join(my_list[:-1])} and {my_list[-1]}.')

An example interpolating a custom message and accepting also a string as argument:

def like(my_animals = None):
    message = 'The animals I like the most are'
    if my_animals == None or my_animals == '' or len(my_animals) == 0:
        return 'I don\'t like any animals.'
    elif len(my_animals) <= 1 or type(my_animals) == str:
        return f'{message} {my_animals if type(my_animals) == str else my_animals[0]}.'
    return f'{message} {", ".join(my_animals[:-1])} and {my_animals[-1]}.'


>>> like()
>>> like('')
>>> like([])
# 'I don't like any animals.'

>>> like('unicorns') 
>>> like(['unicorns']) 
# 'The animals I like the most are unicorns.'

>>> animals = ['unicorns', 'dogs', 'rabbits', 'dragons']
>>> like(animals) 
# 'The animals I like the most are unicorns, dogs, rabbits and dragons.'