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Progress Bars in Notebooks?

Some of my cells take forever to run, so I'd like to be able to see how long they have left. Is it possible to have a progress bar (similar to the one that pops up when creating a tearsheet) for cells?

3 responses

The IPython notebooks cannot tell how long your code is going to run. If you want your cells to have a progress bar, you should add your own.
IPython seems to have functions for creating such a progress bar but they are apparently not part of the "safe" libraries allowed on Q. Anyway, you would still need to call a function at every loop to update it.
As far as I am concerned, if a loop is going to run N times, I use [ print (2*N-1) * "="] to create a baseline, then [print "*",] at each iteration. The coma cancels the line break. I then add a [print ""] after the loop to have a line break at the end of the line.
For a 5-itterations loop, it would give:

* * * * *  

I hope it helps.

@Antoine: Thanks for sharing! And thanks for explaining why the comma helps.


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def progress_bar(iterable, size=100):

    count = len(iterable)  
    print('|', end = '')  
    print((size) * "-", end = '')  

    print(' ', end = '')

    def _update(progress, bar):  
        new_bar = int(size * progress / count)  
        for _ in range(bar, new_bar):  
            print("*", end = '')  
        return new_bar

    bar = 0  
    for i, item in enumerate(iterable):  
        yield item  
        bar = _update(progress=i+1, bar=bar)