On displaying control characters, as of now, at least VSCode and Sublime Text do show them clearly. VSCode uses Unicode control pictures “␄” with a red backgrou

On displaying control characters, as of now, at least VSCode and Sublime Text do show them clearly. VSCode uses Unicode control pictures “␄” with a red background, while Sublime shows plain-text “<EOT>” in grey. You can also copy-paste - the real control character lands on your clipboard. Otherwise the rest of it stands, especially for a non-developer using Notepad or TextEdit. This is trading off ongoing usability for one-time developer convenience. The example given in the post would also struggle with a large file as it loads the entire contents into memory, while having Python feed you lines allows it to read in chunks. Plenty of accurate, unit-tested CSV parsers exist in every language, it’s fine to use one and be done with it. Tabular data formats are a solved problem.