Remove example queue code.

ajdavis · ajdavis · commit e23e97afd005 · 2015-05-02T15:55:58.000-04:00
diff --git a/crawler/crawling.py b/crawler/crawling.py
@@ -42,27 +42,6 @@ def is_redirect(response):
                              'num_new_urls'])
 
 
-class ExampleQueue(Queue):
-    """Simplified joinable queue that doesn't use Event.
-
-    Written to test out code examples in chapter.md. Not actually used below.
-    """
-    def __init__(self, maxsize=0, *, loop=None):
-        super().__init__(maxsize, loop=loop)
-        self._join_future = Future(loop=self._loop)
-
-    def task_done(self):
-        if self._unfinished_tasks <= 0:
-            raise ValueError('task_done() called too many times')
-        self._unfinished_tasks -= 1
-        if self._unfinished_tasks == 0:
-            self._join_future.set_result(None)
-
-    def join(self):
-        if self._unfinished_tasks > 0:
-            yield from self._join_future
-
-
 class Crawler:
     """Crawl a set of URLs.
 
