This is the number one thing that makes it difficult for me to want to switch from JavaScript to Python despite Python otherwise lining up almost perfectly with

This is the number one thing that makes it difficult for me to want to switch from JavaScript to Python despite Python otherwise lining up almost perfectly with my programming/syntax preferences. JavaScript has things like TypeScript (and Babel in general) that add features that are "missing" from the language. Is there anything similar for Python and anonymous functions?