如何以一种与分布无关的方式获得Python中的总物理内存?我不需要已使用的内存,只需要总的物理内存。
发布于 2014-03-01 02:42:36
发布于 2014-03-01 02:53:33
正则表达式在这类事情上工作得很好,并且可能对不同发行版之间的细微差别有所帮助。
import re
with open('/proc/meminfo') as f:
meminfo = f.read()
matched = re.search(r'^MemTotal:\s+(\d+)', meminfo)
if matched:
mem_total_kB = int(matched.groups()[0])
发布于 2017-02-15 20:33:59
在Python 2.7.9中,这段代码在我没有任何外部库的情况下可以正常工作
import os
mem=str(os.popen('free -t -m').readlines())
"""
Get a whole line of memory output, it will be something like below
[' total used free shared buffers cached\n',
'Mem: 925 591 334 14 30 355\n',
'-/+ buffers/cache: 205 719\n',
'Swap: 99 0 99\n',
'Total: 1025 591 434\n']
So, we need total memory, usage and free memory.
We should find the index of capital T which is unique at this string
"""
T_ind=mem.index('T')
"""
Than, we can recreate the string with this information. After T we have,
"Total: " which has 14 characters, so we can start from index of T +14
and last 4 characters are also not necessary.
We can create a new sub-string using this information
"""
mem_G=mem[T_ind+14:-4]
"""
The result will be like
1025 603 422
we need to find first index of the first space, and we can start our substring
from from 0 to this index number, this will give us the string of total memory
"""
S1_ind=mem_G.index(' ')
mem_T=mem_G[0:S1_ind]
print 'Summary = ' + mem_G
print 'Total Memory = ' + mem_T +' MB'
我们可以很容易地获得已用内存和空闲内存
"""
Similarly we will create a new sub-string, which will start at the second value.
The resulting string will be like
603 422
Again, we should find the index of first space and than the
take the Used Memory and Free memory.
"""
mem_G1=mem_G[S1_ind+8:]
S2_ind=mem_G1.index(' ')
mem_U=mem_G1[0:S2_ind]
mem_F=mem_G1[S2_ind+8:]
print 'Used Memory = ' + mem_U +' MB'
print 'Free Memory = ' + mem_F +' MB'
https://stackoverflow.com/questions/22102999
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