From ca9e56dd0158cd7dd732c656ded88e1449342ad1 2016-07-29 21:58:56
From: Danilo J. S. Bellini <danilo.bellini@gmail.com>
Date: 2016-07-29 21:58:56
Subject: [PATCH] Fix dict pretty printer in PyPy #9776

+3 tests passing

---

diff --git a/IPython/lib/pretty.py b/IPython/lib/pretty.py
index 49ee2ce..8cb51aa 100644
--- a/IPython/lib/pretty.py
+++ b/IPython/lib/pretty.py
@@ -753,7 +753,10 @@ _type_pprinters = {
 }
 
 try:
-    _type_pprinters[types.DictProxyType] = _dict_pprinter_factory('<dictproxy {', '}>')
+    # In PyPy, types.DictProxyType is dict, setting the dictproxy printer
+    # using dict.setdefault avoids overwritting the dict printer
+    _type_pprinters.setdefault(types.DictProxyType,
+                               _dict_pprinter_factory('<dictproxy {', '}>'))
     _type_pprinters[types.ClassType] = _type_pprint
     _type_pprinters[types.SliceType] = _repr_pprint
 except AttributeError: # Python 3