application_vnd.jupyter.stderr_output_1.png
animals = ['cat', 'dog', 'monkey']

animals = ['cat', 'dog', 'monkey']

animals = {'cat', 'dog'}
animals.add('fish')
animals.add('cat')

animals = {'cat', 'dog', 'fish'}
for idx, animal in enumerate(animals):
    print('#%d: %s' % (idx + 1, animal))