cats_n_dogs.py

### WAYS TO LOOP OVER TWO THINGS AT ONCE IN PYTHON:

cats = ["fluffy", "puffy", "muffy"]
dogs = ["fido", "rover", "bowser"]

# jinja-specific way, won't work in regular python:
#
# {% for cat in cats %}
#   {{ cat }} {{ dogs[loop.index0] }}
# {% endfor %}

# ways that you can do this in regular python:

# basic and works fine:
for i in range(len(cats)):
    print(f"{cats[i]} and {dogs[i]}")

# loop, getting the item *and* the index (similar to JS' map/filter):
for (i, cat) in enumerate(cats):
    print(f"{cat} and {dogs[i]}")

# using neat built-in function zip, which gives a tuple of both as each loop item:
for cat_and_dog in zip(cats, dogs):
    print(f"{cat_and_dog[0]} and {cat_and_dog[1]}")

# same, but using unpacking (JS: "destructuring") while looping:
for (cat, dog) in zip(cats, dogs):
    print(f"{cat} and {dog}")