upgrade to python3;add some validator examples

python/engine.py

@@ -1,11 +1,17 @@
 
-import logging, os, thread, threading, time, Queue
+import logging
+import _thread
+import threading
+import time
+import queue
 from engineconfig import getConfig
+
+
 class JudgeEngine:
 
     def __init__(self):
         self.quit_event = threading.Event()
-        self.test_queue = Queue.Queue()
+        self.test_queue = queue.Queue()
 
         self.config = getConfig()
         self.quit_event.clear()
@@ -14,11 +20,11 @@ class JudgeEngine:
     def run(self):
         # one thread mode is good for debugging
         if self.config.test_threads == 1:
-            thread.start_new_thread(self.transport, ())
+            _thread.start_new_thread(self.transport, ())
             self.test()
         else:
             for i in range(self.config.test_threads):
-                thread.start_new_thread(self.test, ())
+                _thread.start_new_thread(self.test, ())
             self.transport()
 
         for ds in self.config.datasources:
@@ -30,7 +36,7 @@ class JudgeEngine:
         total = 0
         while not self.quit_event.isSet():
             self.logger.info(
-                "%d submit in test queue, %d processed" % \
+                "%d submit in test queue, %d processed" %
                 (self.test_queue.qsize(), total))
             c = 16 - self.test_queue.qsize()
             if c > 0:
@@ -45,10 +51,10 @@ class JudgeEngine:
 
     def test(self):
         while not self.quit_event.isSet():
-            #pdb.set_trace()
+            # pdb.set_trace()
             try:
                 submit = self.test_queue.get(True, self.config.fetch_interval)
-            except Queue.Empty:
+            except queue.Empty:
                 continue
             tester = self.config.get_tester(submit.language)
             if tester:
@@ -64,6 +70,8 @@ class JudgeEngine:
         self.quit_event.set()
         return
 
-class JudgeError(Exception): pass
+
+class JudgeError(Exception):
+    pass
 
 # vim: set expandtab tabstop=4 shiftwidth=4: