Simple fallback progressbar when tqdm is not available

Question

I have a python package that uses the tqdm progressbar. However, I don't want this to be a hard dependency for the users of my package. Is there some simple drop-in solution that can easily act as fallback if tqdm is not installed?

I am using the total and leave property of tqdm.tqdm(), as well as the update and close methods of the tqdm.tqdm instance.

Answer 1

Sure.

def noobar(itrble, desc):
  """Simple progress bar. To be used if tqdm not installed."""
  L  = len(itrble)
  print('{}: {: >2d}'.format(desc,0), end='')
  for k,i in enumerate(itrble):
    yield i
    p = (k+1)/L
    e = '' if k<(L-1) else '\n'
    print('\b\b\b\b {: >2d}%'.format(int(100*p)), end=e)
    sys.stdout.flush()

Try it with

from time import sleep
for i in noobar(range(5),"my work"):
  sleep(1)