This note explains how to declare Python strings with various quotes, embed quotes inside strings, use escape sequences, and apply raw strings and f‑strings, providing clear code snippets and their outputs for each case.
This article explains Python's escape characters, raw strings, the fundamentals of regular expressions, their matching process, greedy versus non‑greedy quantifiers, backslash handling, and provides detailed examples of the re module's functions such as compile, match, search, split, findall, finditer, sub and subn.
This article explains literal versus meta characters in shells, the three quoting methods (escape, strong, weak), and demonstrates why printing backslashes with echo requires different numbers of backslashes in Bash and Ksh, including work‑arounds like the -E option and set -x debugging.
