我正在寻找一种从Python脚本读取系统正常运行时间的快速和轻量级的方法。有没有办法从sysinfo
调用Python系统调用?
到目前为止,我已经找到了另外两种测量正常运行时间的方法,一种涉及运行外部进程,另一种涉及读取/proc
中的文件。
import subprocess
def uptime1():
raw = subprocess.check_output('uptime').decode("utf8").replace(',', '')
days = int(raw.split()[2])
if 'min' in raw:
hours = 0
minutes = int(raw[4])
else:
hours, minutes = map(int,raw.split()[4].split(':'))
totalsecs = ((days * 24 + hours) * 60 + minutes) * 60
return totalsecs
def uptime2():
with open('/proc/uptime', 'r') as f:
uptime_seconds = float(f.readline().split()[0])
return uptime_seconds
当比较速度时,第二种方法大约快50倍。尽管如此,直接调用系统调用应该更好一些。
>> import timeit
>> print(timeit.timeit('ut.uptime1()', setup="import uptimecalls as ut", number=1000))
1.7286969429987948
>> print(timeit.timeit('ut.uptime2()', setup="import uptimecalls as ut", number=1000))
0.03355383600865025
https://stackoverflow.com/questions/42471475
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