Understandably, we get a little impatient when we do not know how much time a process is going to take, for example, a for loop or a file downloading or an application starting up.
To distract us from that we were given the libraries tqdm and progressbar in Python language which allows us to give a visual illustration of the process completion time using a progress bar. Loading bars are often seen on game screens as the resources required for the game to run are being acquired to the main memory.
Using tqdmWhat It Does
What It Does
It wraps an iterable with the tqdm
to decorate it with the methods built-in with tqdm and make a loading bar. This will take the users’ mind off of how long the process is taking to complete.
How To Use
All we need to do is, install the tqdm
package by typing this line in your terminal and start writing the code.
->pip install tqdm
And type this code in your editor.
from tqdm import tqdm for i in tqdm ( range ( 100 ), desc = "Loading..." ): pass |
Output:
This gives a very fast loading bar because there’s nothing in the loop., you can replace the pass keyword with whatever work you want to do in the for loop.
from tqdm import tqdm import time for i in tqdm ( range ( 101 ), desc = "Loading…" , ascii = False , ncols = 75 ): time.sleep( 0.01 ) print ( "Complete." ) |
Output:
Using progressbarHow To Install
How To Install
For command-line interface
pip install progressbar (or) pip install progressbar2
Working
It does everything the same as tqdm
package, that is it decorates the iterable with the built-in widgets to make an animated progress bar or even a colorful one. Widgets are objects which display depending on the progress bar.
However, the progress bar and the progress bar 2 packages have a lot of extra, useful methods than the tqdm package. For example, we can make an animated loading bar.
import progressbar import time # Function to create def animated_marker(): widgets = [ 'Loading: ' , progressbar.AnimatedMarker()] bar = progressbar.ProgressBar(widgets = widgets).start() for i in range ( 50 ): time.sleep( 0.1 ) bar.update(i) # Driver's code animated_marker() |
Output:
In progressbar.AnimatedMarker()
, we can pass any sequence of characters to animate. The default arguments are '|/-\|'
Here’s another example using some of the commonly used widgets of the ProgressBar class.
import time import progressbar widgets = [ ' [' , progressbar.Timer( format = 'elapsed time: %(elapsed)s' ), '] ' , progressbar.Bar( '*' ), ' (' , progressbar.ETA(), ') ' , ] bar = progressbar.ProgressBar(max_value = 200 , widgets = widgets).start() for i in range ( 200 ): time.sleep( 0.1 ) bar.update(i) |
Output:
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.