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-rw-r--r--Doc/lib/libfuncs.tex4
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index 4a0efdb..491e0fe 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -568,6 +568,10 @@ def my_import(name):
\begin{funcdesc}{len}{s}
Return the length (the number of items) of an object. The argument
may be a sequence (string, tuple or list) or a mapping (dictionary).
+ In the case of Unicode strings, \function{len()} returns the number
+ of storage units, not abstract characters. In particular, when a
+ surrogate pair is encountered, each component of the pair is counted
+ as a separate character.
\end{funcdesc}
\begin{funcdesc}{list}{\optional{sequence}}