diff -r bcfbab86f49a Lib/getopt.py
--- a/Lib/getopt.py	Thu Jan 23 00:36:37 2014 -0500
+++ b/Lib/getopt.py	Fri Jan 31 19:49:02 2014 +0800
@@ -142,20 +142,17 @@
     return opts, prog_args
 
 def do_longs(opts, opt, longopts, args):
-    try:
-        i = opt.index('=')
-    except ValueError:
-        optarg = None
-    else:
-        opt, optarg = opt[:i], opt[i+1:]
+    head, sep, optarg = opt.partition('=')
+    if sep:
+        opt = head
 
     has_arg, opt = long_has_args(opt, longopts)
     if has_arg:
-        if optarg is None:
+        if not sep:
             if not args:
                 raise GetoptError('option --%s requires argument' % opt, opt)
             optarg, args = args[0], args[1:]
-    elif optarg is not None:
+    elif sep:
         raise GetoptError('option --%s must not have an argument' % opt, opt)
     opts.append(('--' + opt, optarg or ''))
     return opts, args
@@ -200,9 +197,9 @@
     return opts, args
 
 def short_has_arg(opt, shortopts):
-    for i in range(len(shortopts)):
-        if opt == shortopts[i] != ':':
-            return shortopts.startswith(':', i+1)
+    for index, shortopt in enumerate(shortopts):
+        if opt == shortopt != ':':
+            return shortopts.startswith(':', index+1)
     raise GetoptError('option -%s not recognized' % opt, opt)
 
 if __name__ == '__main__':