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Python CLI (Command Line) Progress Bar

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

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  1. import sys
  2. import time
  3. import math
  4.  
  5. # Output example: [=======   ] 75%
  6.  
  7. # width defines bar width
  8. # percent defines current percentage
  9. def progress(width, percent):
  10.     marks = math.floor(width * (percent / 100.0))
  11.     spaces = math.floor(width - marks)
  12.  
  13.     loader = '[' + ('=' * int(marks)) + (' ' * int(spaces)) + ']'
  14.  
  15.     sys.stdout.write("%s %d%%\r" % (loader, percent))
  16.     if percent >= 100:
  17.         sys.stdout.write("\n")
  18.     sys.stdout.flush()
  19.  
  20. # Simulate doing something...
  21. for i in xrange(100):
  22.     progress(50, (i + 1)) # +1 because xrange is only 99
  23.     time.sleep(0.1) # Slow it down for demo

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