How to Replace Console Output in Python?

Replace Console Output in Python

In Python, controlling the output to the console can be challenging, especially when you need to update only a portion of the displayed information. This question discusses a solution to replace the current console output with a concise progress counter.

A straightforward approach involves writing a backspace character ("r") followed by the new string without a newline character. By doing this, only the most recent line in the console is updated. This is shown in the code snippet below:

<code class="python">sys.stdout.write("\rDoing thing %i" % i)
sys.stdout.flush()</code>

However, for a more sophisticated progress bar, you can implement a custom function to track the progress and display a dynamic bar based on the progress percentage. Here's an example:

<code class="python">def progress(title):
    global progress_x
    sys.stdout.write(title + ": [&" + "-" * 40 + "]") + chr(8) * 41
    sys.stdout.flush()
    progress_x = 0

def progress(x):
    global progress_x
    progress_x = int(x * 40 // 100)
    sys.stdout.write("#" * (progress_x - progress_x))
    sys.stdout.flush()

def stop_progress():
    sys.stdout.write("#" * (40 - progress_x) + "]\n")
    sys.stdout.flush()</code>

To use this function, call start_progress with the operation description, progress with the percentage, and finally stop_progress to display the complete progress bar in the console.

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