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Add version note about set literals.

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Georg Brandl 2010-10-29 08:53:55 +00:00
parent 4263ad8d37
commit 853faae954
1 changed files with 6 additions and 6 deletions
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Doc/library/stdtypes.rst
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@ -1672,13 +1672,13 @@ There are currently two built-in set types, :class:`set` and :class:`frozenset`.
The :class:`set` type is mutable --- the contents can be changed using methods The :class:`set` type is mutable --- the contents can be changed using methods
like :meth:`add` and :meth:`remove`. Since it is mutable, it has no hash value like :meth:`add` and :meth:`remove`. Since it is mutable, it has no hash value
and cannot be used as either a dictionary key or as an element of another set. and cannot be used as either a dictionary key or as an element of another set.
The :class:`frozenset` type is immutable and :term:`hashable` --- its contents cannot be The :class:`frozenset` type is immutable and :term:`hashable` --- its contents
altered after it is created; it can therefore be used as a dictionary key or as cannot be altered after it is created; it can therefore be used as a dictionary
an element of another set. key or as an element of another set.
Non-empty sets (not frozensets) can be created by placing a comma-separated list As of Python 2.7, non-empty sets (not frozensets) can be created by placing a
of elements within braces, for example: ``{'jack', 'sjoerd'}``, in addition to the comma-separated list of elements within braces, for example: ``{'jack',
:class:`set` constructor. 'sjoerd'}``, in addition to the :class:`set` constructor.
The constructors for both classes work the same: The constructors for both classes work the same: