From 30d5e6c13fc988af2a6c0f8f0cdf43092c241e8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20v=2E=20L=C3=B6wis?= <martin@v.loewis.de>
Date: Wed, 25 Jul 2012 11:32:26 +0200
Subject: [PATCH] Issue #7163: Propagate return value of sys.stdout.write.
 Patch by Roger Serwy.

---
 Lib/idlelib/NEWS.txt        | 2 ++
 Lib/idlelib/OutputWindow.py | 1 +
 Lib/idlelib/PyShell.py      | 7 ++++---
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index ed9e105949f..3a641a019eb 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -1,6 +1,8 @@
 What's New in IDLE 3.2.4?
 =========================
 
+- Issue #7163: Propagate return value of sys.stdout.write.
+
 - Issue #15318: Prevent writing to sys.stdin.
 
 - Issue #13532, #15319: Check that arguments to sys.stdout.write are strings.
diff --git a/Lib/idlelib/OutputWindow.py b/Lib/idlelib/OutputWindow.py
index 565cc9b772d..cba90139976 100644
--- a/Lib/idlelib/OutputWindow.py
+++ b/Lib/idlelib/OutputWindow.py
@@ -40,6 +40,7 @@ def write(self, s, tags=(), mark="insert"):
         self.text.insert(mark, s, tags)
         self.text.see(mark)
         self.text.update()
+        return len(s)
 
     def writelines(self, lines):
         for line in lines:
diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index 83d40dff0bd..0eae7c5cee3 100644
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -760,7 +760,7 @@ def runcode(self, code):
 
     def write(self, s):
         "Override base class method"
-        self.tkconsole.stderr.write(s)
+        return self.tkconsole.stderr.write(s)
 
     def display_port_binding_error(self):
         tkMessageBox.showerror(
@@ -1229,7 +1229,7 @@ def resetoutput(self):
     def write(self, s, tags=()):
         try:
             self.text.mark_gravity("iomark", "right")
-            OutputWindow.write(self, s, tags, "iomark")
+            count = OutputWindow.write(self, s, tags, "iomark")
             self.text.mark_gravity("iomark", "left")
         except:
             raise ###pass  # ### 11Aug07 KBK if we are expecting exceptions
@@ -1238,6 +1238,7 @@ def write(self, s, tags=()):
             self.canceled = 0
             if not use_subprocess:
                 raise KeyboardInterrupt
+        return count
 
 class PseudoFile(object):
 
@@ -1249,7 +1250,7 @@ def __init__(self, shell, tags, encoding=None):
     def write(self, s):
         if not isinstance(s, str):
             raise TypeError('must be str, not ' + type(s).__name__)
-        self.shell.write(s, self.tags)
+        return self.shell.write(s, self.tags)
 
     def writelines(self, lines):
         for line in lines: