Python has a powerful preprocessor allowing for custom encodings and configurations. Source code encoding is defined with magic comments. Additionally, Python can execute arbitrary code during initialization by creating a path configuration file. Custom codecs can be defined to preprocess source files. Unary increment and decrement operators can be emulated using assignment expressions. Brace scoping in Python can be replaced with braces using a token stream modification approach. Interpretation of C/C++ code in Python is possible using the cppyy package. Validation of TOML data using JSON schema in Python can be achieved through preprocessing.
https://pydong.org/posts/PythonsPreprocessor/