[Python3] Trailing newline in readlines.

[perfringo]

I observe some things that can be improved (by my subjective opinion).

1. Get random item from list -> use random.choice. Benefits: only one item is needed, returns item (string) right away. Use sample when more than one random item is needed.

>>> pets = ['cat', 'dog', 'rat', 'gerbil', 'hamster', 'guiniepig', 'monkey', 'snake']
>>> random.choice(pets)
'dog'

2. To construct string from different parts -> use f-strings. Benefits: better visual readability, no need for type conversion (if any). Requires 3.6 <= Python.

# Display ai result symbolically.
>>> print(f'{active_pet} ({active_interior}, {active_exterior})\n')

3. Open files -> use with context manager (as in buran examples). Benefits: file will be always properly and automagically closed, no need for close().

with open('data.txt', 'w') as f:

4. Get only first row in file -> use built-in next(). Benefits: whole file content will not be read into memory/list to just get first row. Grab first row from existing fileobject and you are done.

with open('data.txt', 'r') as f:
    my_data = next(f).strip()           # strips newline at the end, can be omitted.