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-rw-r--r--Doc/lib/libsys.tex9
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diff --git a/Doc/lib/libsys.tex b/Doc/lib/libsys.tex
index 2fda26e..df32182 100644
--- a/Doc/lib/libsys.tex
+++ b/Doc/lib/libsys.tex
@@ -44,6 +44,15 @@ Integer specifying the handle of the Python DLL.
Availability: Windows.
\end{datadesc}
+\begin{funcdesc}{displayhook}{\var{value}}
+If \var{value} is not \code{None}, this function prints it to
+\code{sys.stdout}, and saves it in \code{__builtin__._}.
+
+This function is called when an expression is entered at the prompt
+of an interactive Python session. It exists mainly so it can be
+overridden.
+\end{funcdesc}
+
\begin{funcdesc}{exc_info}{}
This function returns a tuple of three values that give information
about the exception that is currently being handled. The information