December, 2019 | Python-bloggers

data_algebra/rquery as a Category Over Table Descriptions

December 14, 2019 | John Mount

Introduction I would like to talk about some of the design principles underlying the data_algebra package (and also in its sibling rquery package). The data_algebra package is a query generator that can act on either Pandas data frames or on SQL tables. This is discussed on the project ... [...Read more...]

Null hypothesis

December 13, 2019 | OSM

In our previous post we ran two investing strategies based on Apple’s last twelve months price-to-earnings multiple (LTM P/E). One strategy bought Apple’s stock when its multiple dropped below 10x and sold when it rose above 20x. The other bought t...

[...Read more...]

Null hypothesis

December 13, 2019 | OSM

In our previous post we ran two investing strategies based on Apple’s last twelve months price-to-earnings multiple (LTM P/E). One strategy bought Apple’s stock when its multiple dropped below 10x and sold when it rose above 20x. The other bought t...

[...Read more...]

The Path to Becoming a Data Engineer

December 10, 2019 | Vincent Vankrunkelsven

The world of data science is evolving, and it's changing rapidly. In the good old days, all your data was readily available in a single database and all you needed to know as a data scientist was some R or Python to build simple scripts. I, for one, r...

[...Read more...]

Python changing attribute mystery. Help?

December 7, 2019 | John Mount

Python peeps: any idea why this attribute changes value when I re-examine it? I am using PyCharm, but the calculation is weird even in Jupyter. It doesn’t just seem to be the debugger, running it in Jupyter gives the wrong value (just {'x'}, instead of {'x', 'y'}). The type ... [...Read more...]

Valuation hypothesis

December 6, 2019 | OSM

In our last post on valuation, we looked at whether Apple’s historical mutiples could help predict future returns. The notion was that since historic price multiples (e.g., price-to-earnings) reflect the market’s value of the company, when the mult...

[...Read more...]

Valuation hypothesis

December 6, 2019 | OSM

In our last post on valuation, we looked at whether Apple’s historical mutiples could help predict future returns. The notion was that since historic price multiples (e.g., price-to-earnings) reflect the market’s value of the company, when the mult...

[...Read more...]

Slides for PyData LA 2019 vtreat Talk

December 5, 2019 | John Mount

Slides for PyData LA 2019 vtreat Talk are here! [...Read more...]

Gitgirl Wants to Train 13 Million African Women with DataCamp

December 4, 2019 | Joyce Chiu

Gitgirl’s founder, Yvonne Alozie, celebrating with graduating Gitgirl students Gitgirl is a data science academy for women headquartered in Lagos, Nigeria, founded in 2018. Their mission is to train 13 million African women to become data-fluent. To d...