Progress Bars.ipynb
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Two Examples of Progress Bars¶
A Javascript Progress Bar¶
Here is a simple progress bar using HTML/Javascript:
In [2]:
import uuid
import time
from IPython.display import HTML, Javascript, display
divid = str(uuid.uuid4())
pb = HTML(
"""
<div style="border: 1px solid black; width:500px">
<div id="%s" style="background-color:blue; width:0%%"> </div>
</div>
""" % divid)
display(pb)
for i in range(1,101):
time.sleep(0.1)
display(Javascript("$('div#%s').width('%i%%')" % (divid, i)))
The above simply makes a div that is a box, and a blue div inside it with a unique ID (so that the javascript won't collide with other similar progress bars on the same page).
Then, at every progress point, we run a simple jQuery call to resize the blue box to the appropriate fraction of the width of its containing box, and voilà a nice HTML/Javascript progress bar!
ProgressBar class¶
And finally, here is a progress bar class extracted from PyMC, which will work in regular Python as well as in the IPython Notebook
In [3]:
import sys, time
class ProgressBar:
def __init__(self, iterations):
self.iterations = iterations
self.prog_bar = '[]'
self.fill_char = '*'
self.width = 50
self.__update_amount(0)
def animate(self, iter):
print '\r', self,
sys.stdout.flush()
self.update_iteration(iter + 1)
def update_iteration(self, elapsed_iter):
self.__update_amount((elapsed_iter / float(self.iterations)) * 100.0)
self.prog_bar += ' %d of %s complete' % (elapsed_iter, self.iterations)
def __update_amount(self, new_amount):
percent_done = int(round((new_amount / 100.0) * 100.0))
all_full = self.width - 2
num_hashes = int(round((percent_done / 100.0) * all_full))
self.prog_bar = '[' + self.fill_char * num_hashes + ' ' * (all_full - num_hashes) + ']'
pct_place = (len(self.prog_bar) // 2) - len(str(percent_done))
pct_string = '%d%%' % percent_done
self.prog_bar = self.prog_bar[0:pct_place] + \
(pct_string + self.prog_bar[pct_place + len(pct_string):])
def __str__(self):
return str(self.prog_bar)
In [4]:
p = ProgressBar(1000)
for i in range(1001):
time.sleep(0.002)
p.animate(i)