From 0986e716cfc6714251028f482d2bb1fb6a34364e 2012-10-14 20:56:23
From: Sean Vig <sean.v.775@gmail.com>
Date: 2012-10-14 20:56:23
Subject: [PATCH] Add deprecation warnings for sympyprinting

The sympyprinting extension has been moved to SymPy as of version 0.7.2.
For versions containing the new extension, print a deprecation warning
and load the extension from SymPy.

---

diff --git a/IPython/extensions/sympyprinting.py b/IPython/extensions/sympyprinting.py
index 409ebd7..5a2087f 100644
--- a/IPython/extensions/sympyprinting.py
+++ b/IPython/extensions/sympyprinting.py
@@ -9,6 +9,11 @@ Usage
 Once the extension is loaded, Sympy Basic objects are automatically
 pretty-printed.
 
+As of SymPy 0.7.2, maintenance of this extension has moved to SymPy under
+sympy.interactive.ipythonprinting, any modifications to account for changes to
+SymPy should be submitted to SymPy rather than changed here. This module is
+maintained here for backwards compatablitiy with old SymPy versions.
+
 """
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2008  The IPython Development Team
@@ -30,6 +35,8 @@ try:
 except ImportError:
     pass
 
+import warnings
+
 #-----------------------------------------------------------------------------
 # Definitions of special display functions for use with IPython
 #-----------------------------------------------------------------------------
@@ -101,6 +108,19 @@ _loaded = False
 def load_ipython_extension(ip):
     """Load the extension in IPython."""
     import sympy
+
+    # sympyprinting extension has been moved to SymPy as of 0.7.2, if it
+    # exists there, warn the user and import it
+    try:
+        import sympy.interactive.ipythonprinting
+    except ImportError:
+        pass
+    else:
+        warnings.warn("The sympyprinting extension in IPython is deprecated, "
+            "use sympy.interactive.ipythonprinting")
+        ip.extension_manager.load_extension('sympy.interactive.ipythonprinting')
+        return
+
     global _loaded
     if not _loaded:
         plaintext_formatter = ip.display_formatter.formatters['text/plain']