From 3972628de3d569c88451a2a176a1c94d8822b8a6 Mon Sep 17 00:00:00 2001
From: Jon Dufresne <jon.dufresne@gmail.com>
Date: Thu, 18 May 2017 07:35:54 -0700
Subject: bpo-30296 Remove unnecessary tuples, lists, sets, and dicts (#1489)

* Replaced list(<generator expression>) with list comprehension
* Replaced dict(<generator expression>) with dict comprehension
* Replaced set(<list literal>) with set literal
* Replaced builtin func(<list comprehension>) with func(<generator
  expression>) when supported (e.g. any(), all(), tuple(), min(), &
  max())
---
 Lib/tokenize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Lib/tokenize.py')

diff --git a/Lib/tokenize.py b/Lib/tokenize.py
index eea88b7d43..634662da26 100644
--- a/Lib/tokenize.py
+++ b/Lib/tokenize.py
@@ -142,7 +142,7 @@ def _all_string_prefixes():
     #  'rf'). The various permutations will be generated.
     _valid_string_prefixes = ['b', 'r', 'u', 'f', 'br', 'fr']
     # if we add binary f-strings, add: ['fb', 'fbr']
-    result = set([''])
+    result = {''}
     for prefix in _valid_string_prefixes:
         for t in _itertools.permutations(prefix):
             # create a list with upper and lower versions of each
-- 
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