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gh-112278: reduce time cost for platform module when no permission to WMI on Windows #112658

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Merged
zooba merged 6 commits into from
Dec 7, 2023
+44 −15
Merged

gh-112278: reduce time cost for platform module when no permission to WMI on Windows #112658

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2d24810
using an event object to simulate timeout for _wmi.exec_query
aisk Dec 3, 2023
d1630d1
change the _wmi_query implementation to dummy if it failed first time
aisk Dec 3, 2023
497b14a
Update PC/_wmimodule.cpp
aisk Dec 5, 2023
f1ee797
refactor _wmi_query to handle unsupport condition
aisk Dec 5, 2023
2a1ac5a
fix global _wmi declaration
aisk Dec 5, 2023
da0ddb1
handle SetEvent error
aisk Dec 5, 2023
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refactor _wmi_query to handle unsupport condition
  • Loading branch information
@aisk
aisk committed Dec 5, 2023
commit f1ee7976ed6fb39bf3a73299e5e2f996e4a9d479
47 changes: 24 additions & 23 deletions Lib/platform.py
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,10 @@
import sys
import functools
import itertools
try:
import _wmi
except ImportError:
_wmi = None

### Globals & Constants

Expand Down Expand Up @@ -312,30 +316,27 @@ def _syscmd_ver(system='', release='', version='',
version = _norm_version(version)
return system, release, version

try:
import _wmi
except ImportError:
def _wmi_query(table, *keys):

def _wmi_query(table, *keys):
if not _wmi:
raise OSError("not supported")
else:
def _wmi_query(table, *keys):
table = {
"OS": "Win32_OperatingSystem",
"CPU": "Win32_Processor",
}[table]
try:
data = _wmi.exec_query("SELECT {} FROM {}".format(
",".join(keys),
table,
)).split("\0")
except OSError:
global _wmi_query
def _wmi_query(table, *keys):
raise OSError("not supported")
raise OSError("not supported")
split_data = (i.partition("=") for i in data)
dict_data = {i[0]: i[2] for i in split_data}
return (dict_data[k] for k in keys)

table = {
"OS": "Win32_OperatingSystem",
"CPU": "Win32_Processor",
}[table]
try:
data = _wmi.exec_query("SELECT {} FROM {}".format(
",".join(keys),
table,
)).split("\0")
except OSError:
global _wmi
_wmi = None
raise OSError("not supported")
split_data = (i.partition("=") for i in data)
dict_data = {i[0]: i[2] for i in split_data}
return (dict_data[k] for k in keys)


_WIN32_CLIENT_RELEASES = [
Expand Down