From 5eb03bf060674f785ffda490de99d147fa81e523 Mon Sep 17 00:00:00 2001
From: "Bradley M. Froehle" <brad.froehle@gmail.com>
Date: Wed, 9 May 2012 17:34:11 -0700
Subject: [PATCH] Define generic sys.ps{1,2,3}, for use by scripts.

Closes #123
---
 IPython/core/interactiveshell.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/IPython/core/interactiveshell.py b/IPython/core/interactiveshell.py
index d924fa95424..ce69fa11c72 100644
--- a/IPython/core/interactiveshell.py
+++ b/IPython/core/interactiveshell.py
@@ -637,6 +637,11 @@ def init_io(self):
     def init_prompts(self):
         self.prompt_manager = PromptManager(shell=self, config=self.config)
         self.configurables.append(self.prompt_manager)
+        # Set system prompts, so that scripts can decide if they are running
+        # interactively.
+        sys.ps1 = 'In : '
+        sys.ps2 = '...: '
+        sys.ps3 = 'Out: '
 
     def init_display_formatter(self):
         self.display_formatter = DisplayFormatter(config=self.config)