Add a prepend() recipe to teach a chain() idiom#6415
Merged
rhettinger merged 2 commits intopython:masterfrom Apr 8, 2018
Merged
Add a prepend() recipe to teach a chain() idiom#6415rhettinger merged 2 commits intopython:masterfrom
rhettinger merged 2 commits intopython:masterfrom
Conversation
rhettinger
added
needs backport to 3.6
docs
serhiy-storchaka
approved these changes
Apr 8, 2018
Doc/library/itertools.rst
Outdated
| "Prepend a single value in front of an iterator" | ||
| # prepend(1, [2, 3, 4]) -> 1 2 3 4 | ||
| return chain([value], iterator) | ||
|
|
| def prepend(value, iterator): | ||
| "Prepend a single value in front of an iterator" | ||
| # prepend(1, [2, 3, 4]) -> 1 2 3 4 | ||
| return chain([value], iterator) |
Member
There was a problem hiding this comment.
A tuple would be a tiny bit faster, but look more obscure.
Contributor
|
Thanks @rhettinger for the PR 🌮🎉.. I'm working now to backport this PR to: 3.6, 3.7. |
|
GH-6421 is a backport of this pull request to the 3.7 branch. |
miss-islington
pushed a commit
to miss-islington/cpython
that referenced
this pull request
Apr 8, 2018
(cherry picked from commit 9265dd7) Co-authored-by: Raymond Hettinger <rhettinger@users.noreply.github.com>
miss-islington
pushed a commit
to miss-islington/cpython
that referenced
this pull request
Apr 8, 2018
(cherry picked from commit 9265dd7) Co-authored-by: Raymond Hettinger <rhettinger@users.noreply.github.com>
|
GH-6422 is a backport of this pull request to the 3.6 branch. |
rhettinger
added a commit
that referenced
this pull request
Apr 8, 2018
rhettinger
added a commit
that referenced
this pull request
Apr 8, 2018
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
5 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
See discussion at: https://mail.python.org/pipermail/python-ideas/2018-April/049652.html