mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-11-25 04:34:37 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 11

improve idioms (closes #20642)

Browse source 
Patch by Claudiu Popa.
This commit is contained in:
Benjamin Peterson 2014-05-03 20:22:00 -04:00
parent 98baa14109
commit 4ce5f3f203
1 changed files with 3 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

8
Lib/copy.py
View file

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