Generate random numbers in Python — integers, floats, secure
Use random for general cases, secrets for security, and the 3.13 CLI.
Use random for general cases, secrets for security, and the 3.13 CLI.
Search, extract, split, and replace text reliably with Python’s re.
Append to the end, insert at a position, extend from any iterable, or create a new list without mutating the original.
The essential methods, trade-offs, and examples—plus tips for ordering, performance, and common pitfalls.
Use the built-in int() to parse numbers from strings, specify a base when needed, and add validation to avoid crashes.
Use built-in commands to remove named or prefix-based environments and reclaim disk space.