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| author |  Jon Brandvein <brandjon@google.com> | 2016-07-25 15:13:44 +0000 |
|---|---|---|
| committer |  Damien Martin-Guillerez <dmarting@google.com> | 2016-07-26 09:29:57 +0000 |
| commit | 15775b24db1f0fea316e49a1e2d177e44cd4069d (patch) | |
| tree | c1eb7d20562cf50b24a7668de57f15a046dffa3b /site/docs/skylark/concepts.md | |
| parent | 1a1c7f6f25af3be17fc4f97a3308d54d70d74f23 (diff) | |
Allow lists to be modified while a For loop is iterating over them.
This does not affect the loop's iteration. Similar work is needed for
comprehension For clauses.
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MOS_MIGRATED_REVID=128357769
Diffstat (limited to 'site/docs/skylark/concepts.md')
| -rw-r--r-- | site/docs/skylark/concepts.md | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/site/docs/skylark/concepts.md b/site/docs/skylark/concepts.md index 355a15f8c2..7388ab7e87 100644 --- a/site/docs/skylark/concepts.md +++ b/site/docs/skylark/concepts.md @@ -171,8 +171,10 @@ Python: * Recursion is not allowed. -* Loops iterate on a shallow copy of the elements. If the list is modified - during the iteration, you will only see the old values. +* Loops iterate over a shallow copy of the collection. If the collection is a + list or dictionary that is modified during iteration, this will not affect + what values get bound to the loop variable or variables. The changes are + still visible if you directly access the collection. The following Python features are not supported: |