Progress bar fails with ZeroDivisionError using a small number of observations

[vc1492a]

The below line contained within PyNomaly/loop.py fails with a ZeroDivisionError when the total number of observations is less than the terminal or cell width where the code was executed.

PyNomaly/PyNomaly/loop.py

Line 36 in 744fa57

if index % block_size == 0:

The cause is a block_size of 0, which is not allowable with the current implementation.

This can be resolved by changing the code to the following:

    if total < w:
        block_size = int(w / total)
    else:
        block_size = int(total / w)

if index % block_size == 0:

Which will ensure the block_size remains greater than 0 even when the number of observations is less than the width of the terminal / cell window.

[vc1492a]

A unit test has been written in a separate library to ensure that the progress bar is exhibiting the proper behavior when utilized, and can be included as part of the patch for this issue.

[vc1492a]

Added as part of version 0.3.3.