How to create a progress bar in the console in Python
Answer: Use Python to create a console progress bar. 1. Use ASCII characters to implement a simple text progress bar through built-in functions, and use \r to update the same line; 2. It is recommended that the tqdm library automatically display percentages, time-consuming, etc.; 3. You can customize the manual progress bar to add time, ETA and other information.
To create a progress bar in the console using Python, you don't need external libraries for basic implementations. You can build a simple and effective progress bar with just a few lines of code using built-in functions. Below are practical approaches to achieve this.
1. Simple Text-Based Progress Bar
A basic progress bar can be created using ASCII characters like █ (filled block) and spaces. The idea is to update the bar dynamically as a task progresses.
Here's how to do it:
import time
<p>def print_progress_bar(iteration, total, prefix='', suffix='', length=30):
percent = f"{100 <em>(iteration / float(total)):.1f}"
filled_length = int(length</em> iteration // total)
bar = '█' <em>filled_length '-'</em> (length - filled_length)
print(f'\r{prefix} |{bar}| {percent}% {suffix}', end='\r')
if iteration == total:
print()</p> <h1>Example usage</h1> <p>total_steps = 50
for i in range(total_steps 1):
print_progress_bar(i, total_steps, prefix='Progress:', suffix='Complete', length=40)
time.sleep(0.1) # Simulate work</p>This function prints a progress bar that updates on the same line using \r . When the loop finishes, it prints a newline to lock the output.
2. Using tqdm (Recommended for Real Projects)
If you're OK with using a third-party library, tqdm is the most popular and efficient way to create progress bars in Python.
Install it via pip:
pip install tqdm
Then use it like this:
from tqdm import tqdm import time <p>for i in tqdm(range(100), desc="Processing"): time.sleep(0.05)</p>
tqdm automatically handles percentage, elapsed time, estimated remaining time, and speed — all with minimal code.
3. Customizing Output Format
You can enhance your manual progress bar by adding dynamic elements like time elapsed or estimated time left.
Example with elapsed time:
import time
<p>start_time = time.time()
total = 100</p> <p>for i in range(total 1):
time_elapsed = time.time() - start_time
percent = f"{100 <em>i / total:.1f}"
bar = '█'</em> (i // 2) '░' <em>(50 - i // 2)
eta = time_elapsed</em> (total / max(i, 1)) - time_elapsed if i > 0 else 0
print(f'\r[{bar}] {percent}% | Time: {time_elapsed:.1f}s | ETA: {eta:.1f}s', end='')
time.sleep(0.05)
print()</p>Creating a progress bar manually gives you full control, while tqdm saves time and adds advanced features out of the box. For scripts and tools, either approach works well depending on your needs.
Basically, just update the same line using \r and format your visual indicators clearly.
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