diff options
Diffstat (limited to 'Lib/test/test_iterlen.py')
| -rw-r--r-- | Lib/test/test_iterlen.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Lib/test/test_iterlen.py b/Lib/test/test_iterlen.py index cd92801..7469a31 100644 --- a/Lib/test/test_iterlen.py +++ b/Lib/test/test_iterlen.py @@ -20,11 +20,11 @@ This is the case for tuples, range objects, and itertools.repeat(). Some containers become temporarily immutable during iteration. This includes dicts, sets, and collections.deque. Their implementation is equally simple -though they need to permantently set their length to zero whenever there is +though they need to permanently set their length to zero whenever there is an attempt to iterate after a length mutation. The situation slightly more involved whenever an object allows length mutation -during iteration. Lists and sequence iterators are dynanamically updatable. +during iteration. Lists and sequence iterators are dynamically updatable. So, if a list is extended during iteration, the iterator will continue through the new items. If it shrinks to a point before the most recent iteration, then no further items are available and the length is reported at zero. |