https://bugs.python.org/issue37004
to try :meth:`quick_ratio` or :meth:`real_quick_ratio` first to get an
upper bound.
+ .. note::
+
+ Caution: The result of a :meth:`ratio` call may depend on the order of
+ the arguments. For instance::
+
+ >>> SequenceMatcher(None, 'tide', 'diet').ratio()
+ 0.25
+ >>> SequenceMatcher(None, 'diet', 'tide').ratio()
+ 0.5
+
.. method:: quick_ratio()
--- /dev/null
+In the documentation for difflib, a note was added explicitly warning that the results of SequenceMatcher's ratio method may depend on the order of the input strings.
\ No newline at end of file