Backport r59688.

Lib/plat-mac/plistlib.py

@@ -240,8 +240,8 @@ class PlistWriter(DumbXMLWriter):
                 self.simpleElement("true")
             else:
                 self.simpleElement("false")
-        elif isinstance(value, int):
-            self.simpleElement("integer", str(value))
+        elif isinstance(value, (int, long)):
+            self.simpleElement("integer", "%d" % value)
         elif isinstance(value, float):
             self.simpleElement("real", repr(value))
         elif isinstance(value, dict):

Misc/NEWS

@@ -53,6 +53,8 @@ Core and builtins
 Library
 -------
 
+- Bug #1687: Fixed plistlib.py restricts <integer> to Python int when writing.
+
 - Issue #1182: many arithmetic bugs in the decimal module have been
   fixed, and the decimal module has been updated to comply with the
   latest IBM Decimal Arithmetic specification (version 1.66) and