Added comments.

1 files changed, 8 insertions, 9 deletions

diff --git a/source/utils.py b/source/utils.py
index 78c909f5..d6365073 100755
--- a/source/utils.py
+++ b/source/utils.py
@@ -35,7 +35,6 @@ __license__ = "GPLv3"
 #
 
 import re
-import hashlib
 import sqlite3
 import operator
 import urlparse
@@ -58,9 +57,6 @@ from collections import OrderedDict
 
 from StringIO import StringIO
 
-import threading
-LOCKER = threading.Lock()
-
 import os
 import ConfigParser
 # load the configuration
@@ -94,16 +90,19 @@ url_finders = [ \
     re.compile("'\\<((mailto:)|)[-A-Za-z0-9\\.]+@[-A-Za-z0-9\\.]+"), \
 ]
 
-
 from base64 import urlsafe_b64encode, urlsafe_b64decode
 
-
-
 def uri_b64encode(s):
-     return urlsafe_b64encode(s).strip('=')
+    """
+    Encode an URI in base 64 and remove the final '='.
+    """
+    return urlsafe_b64encode(s).strip('=')
 
 def uri_b64decode(s):
-     return urlsafe_b64decode(s + '=' * (4 - len(s) % 4))
+    """
+    Decode a base 64 encoded URI.
+    """
+    return urlsafe_b64decode(s + '=' * (4 - len(s) % 4))
 
 def detect_url_errors(list_of_urls):
     """