🐍 9 Hidden Python Features You Didn’t Know Existed

December 9, 2025

TL;DR

Loops (`for`, `while`) can have an `else` block that runs if the loop completes without a `break`.
The REPL stores the last output in `_` for quick reuse.
Multiple variables can be assigned on a single line.
`zip` allows iterating over multiple lists simultaneously.
`enumerate` provides an automatic counter during iteration.
Underscores (`_`) can be used as visual separators in large numbers for readability.
Variables can be swapped in a single line without a temporary variable.
The `else` block in `try-except` executes only if no exception occurs.
The `if __name__ == "__main__":` block ensures code runs only when the script is executed directly, not when imported.

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