Added some more meat to the PEP

Added a section about Jython issues.

pep-0217.txt

@@ -1,7 +1,7 @@
 PEP: 217
 Title: Display Hook for Interactive Use
 Version: $Revision$
-Author: moshez@math.huji.ac.il (Moshe Zadka)
+Author: peps@zadka.site.co.il (Moshe Zadka)
 Status: Draft
 Type: Standards Track
 Python-Version: 2.1
@@ -20,6 +20,26 @@ Abstract
     Python, so users will have control over the output from the
     interactive interpreter.
 
+Solution
+
+    The bytecode PRINT_EXPR will call sys.displayhook(POP())
+    A displayhook() will be added to the sys builtin module, which is
+    equivalent to
+
+    import __builtin__
+    def displayhook(o):
+        if o is None:
+            return
+        __builtin__._ = o
+        print o
+        
+Jython Issues
+
+    The author knows too little about Jython, but it is very important
+    to be compatible with it. displayhook will have to be added to sys,
+    but since Jython works with Java bytecodes, the compiler would have
+    to be changed too, or maybe not.
+    Barry?
 
 
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