blocks|key|4372084|text|您可以尝试使用以下命令安装psutil：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4372085|pip+install+psutil|code-block|syntax|javascript|4372086|然后使用以下代码片段：|4372087|import+psutil
import+time


def+seconds_elapsed():
++++return+time.time()+-+psutil.boot_time()


print+seconds_elapsed()|4372088|entityMap^0|D|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

You can try installing <code>psutil</code> with:

<pre><code>pip install psutil
</code></pre>

and then use the following fragment of code:

<pre><code>import psutil
import time


def seconds_elapsed():
 return time.time() - psutil.boot_time()


print seconds_elapsed()
</code></pre>

blocks|key|4372665|text|下面是什么：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4372666|import+subprocess
print(subprocess.check_output(['cat',+'/proc/uptime']).decode('utf-8').split()[0])|code-block|syntax|javascript|4372667|不是最快的方法，但简单直接|4372668|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

What about:

<pre><code>import subprocess
print(subprocess.check_output(['cat', '/proc/uptime']).decode('utf-8').split()[0])
</code></pre>

Not the fastest way but simple and direct

blocks|key|4372159|text|坦率地说，这似乎是一个更好的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4372160|def+get_uptime():
++++with+open('/proc/uptime',+'r')+as+f:
++++++++uptime_seconds+=+float(f.readline().split()[0])

++++return+uptime_seconds|code-block|syntax|javascript|4372161|它还有一个额外的好处，不需要任何额外的模块。|4372162|致词：Source|offset|length|4372163|entityMap|0|LINK|mutability|MUTABLE|url|http://planzero.org/blog/2012/01/26/system_uptime_in_python,_a_better_way^0|0|0|0|3|6|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

This frankly seems like a much better solution:

<pre><code>def get_uptime():
 with open('/proc/uptime', 'r') as f:
 uptime_seconds = float(f.readline().split()[0])

 return uptime_seconds
</code></pre>

It also has the added benefit of not requiring any additional modules.

Credits: <a href="http://planzero.org/blog/2012/01/26/system_uptime_in_python,_a_better_way" rel="noreferrer">Source</a>

blocks|key|4372751|text|import+os
print(os.times()[4])|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4372752|python+2|unstyled|4372753|os.times()
Return+a+5-tuple+of+floating+point+numbers+indicating+accumulated+(processor+or+other)+times,+in+seconds.+The+items+are:+user+time,+system+time,+children’s+user+time,+children’s+system+time,+and+elapsed+real+time+since+a+fixed+point+in+the+past,+in+that+order.+See+the+Unix+manual+page+times(2)+or+the+corresponding+Windows+Platform+API+documentation.+On+Windows,+only+the+first+two+items+are+filled,+the+others+are+zero.

https://docs.python.org/2/library/os.html|4372754|python+3|4372755|os.times()
Returns+the+current+global+process+times.+The+return+value+is+an+object+with+five+attributes:

user+-+user+time

system+-+system+time

children_user+-+user+time+of+all+child+processes

children_system+-+system+time+of+all+child+processes

elapsed+-+elapsed+real+time+since+a+fixed+point+in+the+past

For+backwards+compatibility,+this+object+also+behaves+like+a+five-tuple+containing+user,+system,+children_user,+children_system,+and+elapsed+in+that+order.

See+the+Unix+manual+page+times(2)+and+times(3)+manual+page+on+Unix+or+the+GetProcessTimes+MSDN+on+Windows.+On+Windows,+only+user+and+system+are+known;+the+other+attributes+are+zero.

Availability:+Unix,+Windows.

Changed+in+version+3.3:+Return+type+changed+from+a+tuple+to+a+tuple-like+object+with+named+attributes.

https://docs.python.org/3/library/os.html|4372756|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>import os
print(os.times()[4])
</code></pre>
python 2
<pre><code>os.times()
Return a 5-tuple of floating point numbers indicating accumulated (processor or other) times, in seconds. The items are: user time, system time, children’s user time, children’s system time, and elapsed real time since a fixed point in the past, in that order. See the Unix manual page times(2) or the corresponding Windows Platform API documentation. On Windows, only the first two items are filled, the others are zero.

https://docs.python.org/2/library/os.html
</code></pre>
python 3
<pre><code>os.times()
Returns the current global process times. The return value is an object with five attributes:

user - user time

system - system time

children_user - user time of all child processes

children_system - system time of all child processes

elapsed - elapsed real time since a fixed point in the past

For backwards compatibility, this object also behaves like a five-tuple containing user, system, children_user, children_system, and elapsed in that order.

See the Unix manual page times(2) and times(3) manual page on Unix or the GetProcessTimes MSDN on Windows. On Windows, only user and system are known; the other attributes are zero.

Availability: Unix, Windows.

Changed in version 3.3: Return type changed from a tuple to a tuple-like object with named attributes.

https://docs.python.org/3/library/os.html
</code></pre>

I'm looking for a fast and lightweight way to read system uptime from a Python script. Is there a way to call the <code>sysinfo</code> Linux system call from Python?

So far I've found two other methods for measuring uptime, one that involves running an external processes and one that involves reading a file in <code>/proc</code>.

<pre><code>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
</code></pre>

When comparing the speed, the second method is around 50 times faster. Still, calling a system call directly should be yet another order of magnitude better.

<pre><code>&gt;&gt; import timeit
&gt;&gt; print(timeit.timeit('ut.uptime1()', setup="import uptimecalls as ut", number=1000))
1.7286969429987948
&gt;&gt; print(timeit.timeit('ut.uptime2()', setup="import uptimecalls as ut", number=1000))
0.03355383600865025
</code></pre>

Fastest way to get system uptime in Python in Linux

Windows

Python

Unix

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 subprocessdef uptime1():    raw = ...

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