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How much do you know about Python?Cython is a programming language that mixes Python with C, allowing you to call C functions and declare static types for variables. It compiles to C code which is then converted into importable extension modules from Python. It is a popular tool for optimizing bottlenecks in Python code (can achieve 1-1000x performance improvements) and for creating interfaces between Python and C/C++ libraries. Used in NumPy, SciPy and many scientific packages.