Let library modules use the new keyword arguments for list.sort().

Lib/SimpleHTTPServer.py

@@ -99,7 +99,7 @@ class SimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
         except os.error:
             self.send_error(404, "No permission to list directory")
             return None
-        list.sort(lambda a, b: cmp(a.lower(), b.lower()))
+        list.sort(key=lambda a: a.lower())
         f = StringIO()
         f.write("<title>Directory listing for %s</title>\n" % self.path)
         f.write("<h2>Directory listing for %s</h2>\n" % self.path)

Lib/UserList.py

@@ -77,7 +77,7 @@ class UserList:
     def count(self, item): return self.data.count(item)
     def index(self, item, *args): return self.data.index(item, *args)
     def reverse(self): self.data.reverse()
-    def sort(self, *args): self.data.sort(*args)
+    def sort(self, *args, **kwds): self.data.sort(*args, **kwds)
     def extend(self, other):
         if isinstance(other, UserList):
             self.data.extend(other.data)

Lib/_strptime.py

@@ -231,10 +231,8 @@ class TimeRE(dict):
                 break
         else:
             return ''
-        to_sort = [(len(item), item) for item in to_convert]
-        to_sort.sort()
-        to_sort.reverse()
-        to_convert = [item for length, item in to_sort]
+        to_convert = to_convert[:]
+        to_convert.sort(key=len, reverse=True)
         regex = '|'.join(to_convert)
         regex = '(?P<%s>%s' % (directive, regex)
         return '%s)' % regex

Lib/difflib.py

@@ -701,15 +701,11 @@ def get_close_matches(word, possibilities, n=3, cutoff=0.6):
            s.quick_ratio() >= cutoff and \
            s.ratio() >= cutoff:
             result.append((s.ratio(), x))
-    # Sort by score.
-    result.sort()
-    # Retain only the best n.
-    result = result[-n:]
-    # Move best-scorer to head of list.
-    result.reverse()
-    # Strip scores.
-    return [x for score, x in result]
 
+    # Move the best scorers to head of list
+    result.sort(reverse=True)
+    # Strip scores for the best n matches
+    return [x for score, x in result[:n]]
 
 def _count_leading(line, ch):
     """

Lib/inspect.py

@@ -553,7 +553,7 @@ def getsource(object):
 def walktree(classes, children, parent):
     """Recursive helper function for getclasstree()."""
     results = []
-    classes.sort(lambda a, b: cmp(a.__name__, b.__name__))
+    classes.sort(key=lambda c: c.__name__)
     for c in classes:
         results.append((c, c.__bases__))
         if c in children:

Lib/pydoc.py

@@ -779,7 +779,7 @@ class HTMLDoc(Doc):
             tag += ':<br>\n'
 
             # Sort attrs by name.
-            attrs.sort(lambda t1, t2: cmp(t1[0], t2[0]))
+            attrs.sort(key=lambda t: t[0])
 
             # Pump out the attrs, segregated by kind.
             attrs = spill('Methods %s' % tag, attrs,

Lib/sre_constants.py

@@ -219,7 +219,7 @@ if __name__ == "__main__":
     import string
     def dump(f, d, prefix):
         items = d.items()
-        items.sort(lambda a, b: cmp(a[1], b[1]))
+        items.sort(key=lambda a: a[1])
         for k, v in items:
             f.write("#define %s_%s %s\n" % (prefix, string.upper(k), v))
     f = open("sre_constants.h", "w")