Fix compatibility with Python 3.3.1.

README.md

@@ -6,8 +6,7 @@ Master branch: [![Build Status (master branch)](https://travis-ci.org/ProgVal/Li
 
 Testing branch: [![Build Status (testing branch)](https://travis-ci.org/ProgVal/Limnoria.png?branch=testing)](https://travis-ci.org/ProgVal/Limnoria)
 
-Limnoria is tested with Python 2.6, 2.7, 3.2, and Pypy. Python 2.5 is not supported.
+Limnoria is tested with Python 2.6, 2.7, 3.2, 3.3, and Pypy. Python 2.5 and older versions are not supported.
-Python 3.3 is not fully supported because of a [bug in Python](http://bugs.python.org/issue17856)
 
 # EVERYONE:
 

src/world.py

@@ -36,8 +36,9 @@ import os
 import sys
 import time
 import atexit
+import select
 import threading
-import multiprocessing # python 2.6 and later!
+import multiprocessing
 
 import re
 
@@ -73,6 +74,28 @@ class SupyProcess(multiprocessing.Process):
         super(SupyProcess, self).__init__(*args, **kwargs)
         log.debug('Spawning process %q.', self.name)
 
+if sys.version_info[0:3] == (3, 3, 1) and hasattr(select, 'poll'):
+    # http://bugs.python.org/issue17707
+    import multiprocessing.connection
+    def _poll(fds, timeout):
+        if timeout is not None:
+            timeout = int(timeout * 1000)  # timeout is in milliseconds
+        fd_map = {}
+        pollster = select.poll()
+        for fd in fds:
+            pollster.register(fd, select.POLLIN)
+            if hasattr(fd, 'fileno'):
+                fd_map[fd.fileno()] = fd
+            else:
+                fd_map[fd] = fd
+        ls = []
+        for fd, event in pollster.poll(timeout):
+            if event & select.POLLNVAL:
+                raise ValueError('invalid file descriptor %i' % fd)
+            ls.append(fd_map[fd])
+        return ls
+    multiprocessing.connection._poll = _poll
+
 
 commandsProcessed = 0