Issue 4382 - Use new syntax to catch exceptions in buildtools

publicSuffixListUpdater.py

 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 """
 Update the public suffix list
 ==============================
 
   This script generates a js array of public suffixes (http://publicsuffix.org/)
 """
 
 import os
 import urllib
 import json
 
 
 def urlopen(url, attempts=3):
     """
     Tries to open a particular URL, retries on failure.
     """
     for i in range(attempts):
         try:
             return urllib.urlopen(url)
-        except IOError, e:
+        except IOError as e:
             error = e
             time.sleep(5)
     raise error
 
 
 def getPublicSuffixList():
     """
     gets download link for a Gecko add-on from the Mozilla Addons site
     """
     suffixes = {}
@@ skipping 16 matching lines @@
 
 def updatePSL(baseDir):
     """
     writes the current public suffix list to js file in json format
     """
 
     psl = getPublicSuffixList()
     file = open(os.path.join(baseDir, 'lib', 'publicSuffixList.js'), 'w')
     print >>file, 'var publicSuffixes = ' + json.dumps(psl, sort_keys=True, indent=4, separators=(',', ': ')) + ';'
     file.close()