Definitely learn Python. It’s extremely popular with data science but also makes for a great general purpose scripting language. For Web Devleopment with Python

Definitely learn Python. It’s extremely popular with data science but also makes for a great general purpose scripting language. For Web Devleopment with Python the most popular options are Django and Flask. Django is an opinionated framework (like Ruby on rails) and has a large setup while Flask is un-opinionated and very easy to start something from scratch (like Ruby on Rails). I’ve been programming with JavaScript for 20+ years now and learned Python only a few years ago. Actually I did some a very small project in it over 10 years ago but didn’t remember enough so I had to relearn (and it’s relatively quick to learn compared to other languages I feel). I’ve used it at 3 different jobs now for a variety of scripting tasks that I would have previously used C#/.NET or other languages for and I've developed a number of sites with Flask now (both on Linux and Windows with IIS). If you are based on the US a lot of companies here that look for hire for C#/.NET and Java. Larger corporate type companies for .NET while Java is commonly used for high traffic sites (game engines, etc).