[Python-checkins] bpo-41364: Reduce import overhead of uuid module (GH-21586)
Steve Dower
webhook-mailer at python.org
Wed Jul 22 07:26:42 EDT 2020
https://github.com/python/cpython/commit/a18f22ab11a7bfb5ff3e74c737ca9e1bebe4abf9
commit: a18f22ab11a7bfb5ff3e74c737ca9e1bebe4abf9
branch: 3.8
author: Steve Dower <steve.dower at python.org>
committer: GitHub <noreply at github.com>
date: 2020-07-22T12:26:37+01:00
summary:
bpo-41364: Reduce import overhead of uuid module (GH-21586)
files:
A Misc/NEWS.d/next/Library/2020-07-21-21-45-55.bpo-41364.5O-k7A.rst
M Lib/uuid.py
diff --git a/Lib/uuid.py b/Lib/uuid.py
index 188e16ba14e37..9540c21e6569f 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -45,7 +45,6 @@
"""
import os
-import platform
import sys
from enum import Enum
@@ -54,10 +53,13 @@
__author__ = 'Ka-Ping Yee <ping at zesty.ca>'
# The recognized platforms - known behaviors
-_AIX = platform.system() == 'AIX'
-_DARWIN = platform.system() == 'Darwin'
-_LINUX = platform.system() == 'Linux'
-_WINDOWS = platform.system() == 'Windows'
+if sys.platform in ('win32', 'darwin'):
+ _AIX = _LINUX = False
+else:
+ import platform
+ _platform_system = platform.system()
+ _AIX = _platform_system == 'AIX'
+ _LINUX = _platform_system == 'Linux'
RESERVED_NCS, RFC_4122, RESERVED_MICROSOFT, RESERVED_FUTURE = [
'reserved for NCS compatibility', 'specified in RFC 4122',
@@ -688,9 +690,9 @@ def _random_getnode():
# @unittest.skipUnless(_uuid._ifconfig_getnode in _uuid._GETTERS, ...)
if _LINUX:
_OS_GETTERS = [_ip_getnode, _ifconfig_getnode]
-elif _DARWIN:
+elif sys.platform == 'darwin':
_OS_GETTERS = [_ifconfig_getnode, _arp_getnode, _netstat_getnode]
-elif _WINDOWS:
+elif sys.platform == 'win32':
_OS_GETTERS = [_netbios_getnode, _ipconfig_getnode]
elif _AIX:
_OS_GETTERS = [_netstat_getnode]
diff --git a/Misc/NEWS.d/next/Library/2020-07-21-21-45-55.bpo-41364.5O-k7A.rst b/Misc/NEWS.d/next/Library/2020-07-21-21-45-55.bpo-41364.5O-k7A.rst
new file mode 100644
index 0000000000000..f136e892ae5fe
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-07-21-21-45-55.bpo-41364.5O-k7A.rst
@@ -0,0 +1 @@
+Reduce import overhead of :mod:`uuid`.
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