Standalone python scripts for canned analysis

[slabasan]

• remove examples/python_scripts/.gitignore once a python file has been added

@Thionazin Once you have your python scripts of different analyses, please add them to this PR.

[pearce8]

@Thionazin
[ ] Address comments on PR
[ ] Make input parameter names clear, make clear which are optional, add --help messages
[ ] Add error checking for parameters
[ ] make_graph should be renamed to make_figure, also take optional parameters for title and label names
[ ] Upload new figures here

[michaelmckinsey1]

1. I think we rename examples.rst to canned_analysis.rst and change the doc title to Canned Analysis
2. Is the examples directory going to contain other things than python scripts? Otherwise can we remove the python_scripts directory level and maybe these scripts are labeled like the tutorial notebooks 01A_display_valid_metadata_metric.py, 01B_stacked_line_charts.py.

[dyokelson]

@Thionazin your unit tests are failing on flake8 formatting, make sure you run flake8 and check any of your files that changed back in, all checks/unit tests need to pass before we can merge. But I have other changes to suggest so this can wait until you've made other updates.

[dyokelson]

Thanks for the updates @Thionazin, this is looking pretty good to me, just a question for @pearce8 about the strong scaling graph. Also @michaelmckinsey1 can you just go over your comments and let me know if any still apply or otherwise mark them as resolved?

Once those two things are settled I'll approve it for merging.

[dyokelson]

@pearce8 Do these strong scaling results look as expected to you? Shouldn't we be seeing speedup for higher mpi world size? Just wanted to sanity check, in case I'm just missing something. The weak scaling graph looks as I would expect.

[michaelmckinsey1]

Maybe the problem size was not large enough?

[michaelmckinsey1]

[ ✓] Address comments on PR
[ ✓] Make input parameter names clear, make clear which are optional, add --help messages
[ ✓] Add error checking for parameters
[ ✓] make_graph should be renamed to make_figure, also take optional parameters for title and label names
[ ✓] Upload new figures here