examples: webcrawler: urls tuple->list + more style fixes

examples/webcrawler.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python
 """
 This is a simple web "crawler" that fetches a bunch of urls using a pool to
 control the number of outbound connections. It has as many simultaneously open
@@ -7,23 +7,24 @@ connections as coroutines in the pool.
 The prints in the body of the fetch function are there to demonstrate that the
 requests are truly made in parallel.
 """
-
-urls = (
-    "https://www.google.com/intl/en_ALL/images/logo.gif",
-    "http://python.org/images/python-logo.gif",
-    "http://us.i1.yimg.com/us.yimg.com/i/ww/beta/y3.gif"
-)
-
 import eventlet
 from eventlet.green import urllib2
 
 
+urls = [
+    "https://www.google.com/intl/en_ALL/images/logo.gif",
+    "http://python.org/images/python-logo.gif",
+    "http://us.i1.yimg.com/us.yimg.com/i/ww/beta/y3.gif",
+]
+
+
 def fetch(url):
     print "opening", url
     body = urllib2.urlopen(url).read()
     print "done with", url
     return url, body
 
+
 pool = eventlet.GreenPool(200)
 for url, body in pool.imap(fetch, urls):
     print "got body from", url, "of length", len(body)