From 5680b95b151f19505d2791f420227dc04a2abfc5 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Thu, 16 Feb 1995 16:29:01 +0000
Subject: added list of restrictions

---
 Doc/lib/libshelve.tex | 19 ++++++++++++++++++-
 Doc/libshelve.tex     | 19 ++++++++++++++++++-
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/Doc/lib/libshelve.tex b/Doc/lib/libshelve.tex
index 3e2bef9..0dec230 100644
--- a/Doc/lib/libshelve.tex
+++ b/Doc/lib/libshelve.tex
@@ -30,9 +30,26 @@ list = d.keys() # a list of all existing keys (slow!)
 d.close()       # close it
 \end{verbatim}
 
+Restrictions:
+
+\begin{itemize}
+
+\item
+The choice of which database package will be used (e.g. dbm or gdbm)
+depends on which interface is available.  Therefore it isn't safe to
+open the database directly using dbm.  The database is also
+(unfortunately) subject to the limitations of dbm, if it is used ---
+this means that (the pickled representation of) the objects stored in
+the database should be fairly small, and in rare cases key collisions
+may cause the database to refuse updates.
+
+\item
 Dependent on the implementation, closing a persistent dictionary may
 or may not be necessary to flush changes to disk.
 
-Note: \code{shelve} does not support {\em concurrent} access to
+\item
+The \code{shelve} module does not support {\em concurrent} access to
 shelved objects.  Two programs should not try to simultaneously access
 the same shelf.
+
+\end{itemize}
diff --git a/Doc/libshelve.tex b/Doc/libshelve.tex
index 3e2bef9..0dec230 100644
--- a/Doc/libshelve.tex
+++ b/Doc/libshelve.tex
@@ -30,9 +30,26 @@ list = d.keys() # a list of all existing keys (slow!)
 d.close()       # close it
 \end{verbatim}
 
+Restrictions:
+
+\begin{itemize}
+
+\item
+The choice of which database package will be used (e.g. dbm or gdbm)
+depends on which interface is available.  Therefore it isn't safe to
+open the database directly using dbm.  The database is also
+(unfortunately) subject to the limitations of dbm, if it is used ---
+this means that (the pickled representation of) the objects stored in
+the database should be fairly small, and in rare cases key collisions
+may cause the database to refuse updates.
+
+\item
 Dependent on the implementation, closing a persistent dictionary may
 or may not be necessary to flush changes to disk.
 
-Note: \code{shelve} does not support {\em concurrent} access to
+\item
+The \code{shelve} module does not support {\em concurrent} access to
 shelved objects.  Two programs should not try to simultaneously access
 the same shelf.
+
+\end{itemize}
-- 
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