How to take progress update and turn into a progress bar?

Question

I'm using a speech-to-text API and while waiting for the results I'm able to print the current percentage of progress with this:

    while not operation.done():
        print(operation.metadata.progress_percent)
        time.sleep(5)
    print(operation.metadata.progress_percent)

And get this:

    0
    2
    3
    ...

How can i turn it into a progress bar?

Answer 1

You can end the line of a print statement with a carriage return, \r, to overwrite the current line, and use that to continually "update" the progress bar.

An example of printing a progress bar:

import time

def progress_bar(progress, total=100, bar_length=20):
  # How much of the bar should be filled
  fill = progress * bar_length // total
  # How much of the bar should be empty
  empty = bar_length - fill
  print(f'[{"#"*fill}{"-"*empty}]', end='\r')
  # Go to next line if done
  if progress == total:
    print()

# Emulate a percentage progress
for i in range(0, 101):
  progress_bar(i)
  time.sleep(0.05)

This will output a bar that looks like this

[##############------]