The algorithm for generating those tokens is explained in the Lexical Analysis reference[0], and a quick look at the cpython source shows the logic is implement

The algorithm for generating those tokens is explained in the Lexical Analysis reference[0], and a quick look at the cpython source shows the logic is implemented in Parser/tokenizer.c[1]. [0]: https://docs.python.org/3/reference/lexical_analysis.html#indentation https://docs.python.org/3/reference/lexical_analysis.html#in... [1]: https://github.com/python/cpython/blob/master/Parser/tokenizer.c https://github.com/python/cpython/blob/master/Parser/tokeniz...