https://cython.org/

The Cython language is a superset of the Python language that additionally supports calling C functions and declaring C types on variables and class attributes

Cython is the ideal language for wrapping external C libraries, embedding CPython into existing applications, and for fast C modules that speed up the execution of Python code.

Cython is in tha anaconda distro

Cython code must, unlike Python, be compiled.

Cython can be used conveniently and interactively from a web browser through the Jupyter notebook.

Note: Cython is not to be confused with CPython, which is the primary Python execution environment written in C