Half of all developers using Python as their main language also use JavaScript.

JavaScript is used by 79% of web developers, but only by 39% of those primarily involved in data analysis or machine learning. See the next section for insights into types of development.

The breakdown of languages is slightly different for those who use Python as their secondary language, with a little fewer developers using JavaScript (46%) but far more also using C/C++ (42%), Java (41%), and C# (24%).