Python CLI（命令行）进度条

Posted 2021-02-26

This is a function that will show a progress bar of the given percentage. Useful when performing time consuming tasks.

import sys
import time
import math
 
# Output example: [=======   ] 75%
 
# width defines bar width
# percent defines current percentage
def progress(width, percent):
    marks = math.floor(width * (percent / 100.0))
    spaces = math.floor(width - marks)
 
    loader = '[' + ('=' * int(marks)) + (' ' * int(spaces)) + ']'
 
    sys.stdout.write("%s %d%%
" % (loader, percent))
    if percent >= 100:
        sys.stdout.write("
")
    sys.stdout.flush()
 
# Simulate doing something...
for i in xrange(100):
    progress(50, (i + 1)) # +1 because xrange is only 99
    time.sleep(0.1) # Slow it down for demo