Installs into .claude/skills of the current project.
Are you the author of Use Enumerate And Zip?
Add the live security badge to your README. It updates with every re-scan.
[](https://www.skillsdirectory.com/skills/samugit83-use-enumerate-and-zip)
---
name: use-enumerate-and-zip
description: When a loop needs an index or walks two sequences together, use enumerate or zip
---
# enumerate and zip
`range(len(xs))` exists to be replaced.
- Need the position: `for i, x in enumerate(xs)`, with `start=1` when the
position is shown to a person.
- Walking two sequences: `for a, b in zip(xs, ys)`, and `strict=True` when they
are meant to be the same length, so a mismatch is an error rather than a
silently short result.
- Need both: `for i, (a, b) in enumerate(zip(xs, ys))`.
Indexing into a sequence inside a loop that already yields its items is almost
always a leftover from an earlier version of the code.
