[Python-checkins] cpython: improve idioms (closes #20642)

[benjamin.peterson]

http://hg.python.org/cpython/rev/0df3004581fe
changeset:   90552:0df3004581fe
user:        Benjamin Peterson <benjamin at python.org>
date:        Sat May 03 20:22:00 2014 -0400
summary:
  improve idioms (closes #20642)

Patch by Claudiu Popa.

files:
  Lib/copy.py |  8 +++-----
  1 files changed, 3 insertions(+), 5 deletions(-)


diff --git a/Lib/copy.py b/Lib/copy.py
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -221,17 +221,15 @@
 d[list] = _deepcopy_list
 
 def _deepcopy_tuple(x, memo):
-    y = []
-    for a in x:
-        y.append(deepcopy(a, memo))
+    y = [deepcopy(a, memo) for a in x]
     # We're not going to put the tuple in the memo, but it's still important we
     # check for it, in case the tuple contains recursive mutable structures.
     try:
         return memo[id(x)]
     except KeyError:
         pass
-    for i in range(len(x)):
-        if x[i] is not y[i]:
+    for k, j in zip(x, y):
+        if k is not j:
             y = tuple(y)
             break
     else:

-- 
Repository URL: http://hg.python.org/cpython