I mean, i clicked on the link intrigued by promise of [rare] occurrence of female programmers expressing their views on Python vs. Ruby, and read the article somewhat surprised and confused by its tone, style and thought flow - as it was dude's thinking, not gal's :) It is a misleading and deceptive advertising practice :)
[1] Followers of the Mexican revolutionary Zapata, supposedly.
For instance, 'barista' applies to both men and women in Italy.
The Python case is similar to the widely used "fashionista" for females and "fashionisto" for males in the fasion. Thus it is expected to be "pythonisto" and "pythonistos" for male(s) until there is some gender confusion :)
There are exceptions to the rule, like the one above (Zapatistas) or some professions like "doctores" or "jueces", but they are exception not the rule. There are also many words that dont have a feminine plural, i.e "las soldados", "las jueces", etc
In Italian it is true that the last letter is not a perfect indication of gender... even for people's names (e.g. Andrea should be a male name). But it works pretty well. Not sure if Spanish is similar (i.e. there are exceptions) or not.