Fish

Here is the script with the logic - fish.py.

Install

$ pip install fish

Usage

Test on the CLI:

$ python -m fish
 >))'>

Fish:

import fish


while churning:
    churn_churn()
   fish.animate()

The bass:

">))'>"

The salmon:

><{{{*>

Bird:

  • app.py 
      from fish import Bird


  bird = Bird()

  while True:
      bird.animate()

           ___
       _,-' ______
     .'  .-'  ____7
    /   /   ___7
  _|   /  ___7
>(@)\ | ___7
  \\/     \_____,.'__
  '        _/''&;>*
  `'----\\`

There’s also a duck.

     _
\. _(9>
 \==_)
  -'=

There’s also an option to show a percentage rather than just a continuously moving animation that goes left and right across the screen until it is done.

A recommendation to your own, at a lower level:

msg = f"\x1b[2K\r{fish}\r"
sys.stderr.write(msg)

Progressbar

import time

import progressbar


for i in progressbar.progressbar(range(100)):
    time.sleep(0.02)