diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/stdtypes.rst | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst index aeecdbb..0a6bb14 100644 --- a/Doc/library/stdtypes.rst +++ b/Doc/library/stdtypes.rst @@ -4254,7 +4254,10 @@ pairs within braces, for example: ``{'jack': 4098, 'sjoerd': 4127}`` or ``{4098: Create a new dictionary with keys from *iterable* and values set to *value*. :meth:`fromkeys` is a class method that returns a new dictionary. *value* - defaults to ``None``. + defaults to ``None``. All of the values refer to just a single instance, + so it generally doesn't make sense for *value* to be a mutable object + such as an empty list. To get distinct values, use a :ref:`dict + comprehension <dict>` instead. .. method:: get(key[, default]) |