🐍 Visualizing Function Execution in Python with a Simple Progress Bar

Have you ever wanted to track the progress of a series of function calls in Python — maybe during some tasks that take time to complete?

In this short post, I’ll show you a minimal example of how to execute a list of functions sequentially while displaying a simple progress bar to track completion in the terminal.

🔧 Code Walkthrough

import time

def test_1():
    time.sleep(5)
    print('this is function 1')

def test_2():
    time.sleep(2)
    print('this is function 2')

def test_3():
    time.sleep(3)
    print('this is function 3')

def test_4():
    time.sleep(1)
    print('this is function 4')


func_list = [
    {'index': 1, 'func': test_1},
    {'index': 2, 'func': test_2},
    {'index': 3, 'func': test_3},
    {'index': 4, 'func': test_4},
]

for func_dict in func_list:
    index = func_dict['index']
    function = func_dict['func']

    # call function
    function()

    # progress bar
    progress_total = len(func_list)
    progress_bar = int((index / progress_total) * progress_total)

    # percent
    percent = int((index / progress_total) * 100)

    print('🟩' * progress_bar, f'{percent} %')

🧠 What’s Happening Here?

1. - time.sleep() is used to simulate time-consuming operations.
2. - We store functions in a list of dictionaries with their respective index.
3. - After each function call, we calculate:
4. - Progress bar length
5. - Percent complete
6. - A simple emoji-based progress bar (🟩) is printed after each function.

✅ Sample Output

this is function 1
🟩 25 %
this is function 2
🟩🟩 50 %
this is function 3
🟩🟩🟩 75 %
this is function 4
🟩🟩🟩🟩 100 %

💡 Ideas for Improvement

• Add concurrent execution using asyncio or concurrent.futures.
• Turn the progress bar into a dynamic inline update (e.g., using \r or libraries like tqdm).
• Add color using the colorama library or similar.

If you found this helpful, drop a ❤️ or follow me for more Python tips!
Let me know in the comments: How would you improve this basic progress tracker?