Another interesting aspect of GitHub's report is its ranking of fastest-growing languages. Google's Dart programming language and Flutter, for building UIs for iOS and Android apps, are getting major traction with developers on GitHub.
Dart was the fastest-growing language between 2018 and 2019, with usage up a massive 532%. It was followed by the Mozilla-developed Rust, which grew a respectable 235%.
Last year Kotlin, the Google-endorsed programming language for Android app development, was the fastest-growing language on GitHub. It's not a top-10 language yet, but it still grew 182% over the year.
Other languages making up the top 10 fastest-growing category are HCL, PowerShell, Apex, Python, Assembly, and Go.
GitHub's top 10 fast-growing languages, 2018-2019. Source: GitHub
But the real champion in GitHub's report is Python, whose popularity is being propelled by data-science pros, hobbyists, and the wealth of data-science libraries, such as numpy, that allow developers to tailor Python code for machine-learning tasks.
In July, it suggested that users from banned nations could use GitHub Enterprise Server, its paid-for on-premise version for hosting code privately. However, it's now illegal for GitHub to sell licenses for this product to banned countries. Users from nations facing US trade sanctions can still contribute to public repositories.
"GitHub Enterprise Server may not be sold to, exported, or re-exported to any country listed in Country Group E:1 in Supplement No. 1 to part 740 of the EAR or to the Crimea region of Ukraine. This list currently contains Cuba, Iran, North Korea, and Syria, but is subject to change."
These restrictions do pose a problem for GitHub's growth prospects. As it notes in the Octoverse report: "Iranian developers had the second-highest growth in open-source projects created in public repositories."