Added a paragraph to the documentation about the fact that bs4 Tag implements __hash__ and bs3 Tag doesn't.

1 files changed, 5 insertions, 0 deletions

diff --git a/doc/source/index.rst b/doc/source/index.rst
index 1159195..f655327 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -3495,6 +3495,11 @@ B.string. (Previously, it was None.)
 their values, not strings. This may affect the way you search by CSS
 class.
 
+``Tag`` objects now implement the ``__hash__`` method, such that two
+``Tag`` objects are considered equal if they generate the same
+markup. This may change your script's behavior if you put ``Tag``
+objects into a dictionary or set.
+
 If you pass one of the ``find*`` methods both :ref:`string <string>` `and`
 a tag-specific argument like :ref:`name <name>`, Beautiful Soup will
 search for tags that match your tag-specific criteria and whose