Python to print out status bar and percentage

Question

To implement a status bar like below:

[==========                ]  45%
[================          ]  60%
[==========================] 100%

Answer 1

As described in Mark Rushakoff's solution, you can output the carriage return character, sys.stdout.write('\r'), to reset the cursor to the beginning of the line. To generalize that solution, while also implementing Python 3's f-Strings, you could use

from time import sleep
import sys

n_bar = 50
iterable = range(33)  # for demo purposes
n_iter = len(iterable)
for i, item in enumerate(iterable):
    j = (i + 1) / n_iter

    sys.stdout.write('\r')
    sys.stdout.write(f"[{'=' * int(n_bar * j):{n_bar}s}] {int(100 * j)}%")
    sys.stdout.flush()

    sleep(0.05)  
    # do something with  here