[Python-checkins] bpo-41364: Reduce import overhead of uuid module (GH-21586)
Steve Dower
webhook-mailer at python.org
Tue Jul 21 19:16:10 EDT 2020
https://github.com/python/cpython/commit/bf2f76ec0976c09de79c8827764f30e3b6fba776
commit: bf2f76ec0976c09de79c8827764f30e3b6fba776
branch: master
author: Steve Dower <steve.dower at python.org>
committer: GitHub <noreply at github.com>
date: 2020-07-22T00:15:47+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 9ddce813fc469..5ae0a3e5fa449 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'
_MAC_DELIM = b':'
_MAC_OMITS_LEADING_ZEROES = False
@@ -618,9 +620,9 @@ 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':
# bpo-40201: _windll_getnode will always succeed, so these are not needed
_OS_GETTERS = []
elif _AIX:
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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