Comment puis-je obtenir la mémoire physique totale dans Python d'une manière agnostique de distribution? Je n'ai pas besoin de mémoire utilisée, juste la mémoire physique totale.
Utilisation de os.sysconf
sous Linux:
import os
mem_bytes = os.sysconf('SC_PAGE_SIZE') * os.sysconf('SC_PHYS_PAGES') # e.g. 4015976448
mem_gib = mem_bytes/(1024.**3) # e.g. 3.74
Remarque:
SC_PAGE_SIZE
est souvent 4096.SC_PAGESIZE
et SC_PAGE_SIZE
sont égaux.man sysconf
. Utilisation de /proc/meminfo
sous Linux:
meminfo = dict((i.split()[0].rstrip(':'),int(i.split()[1])) for i in open('/proc/meminfo').readlines())
mem_kib = meminfo['MemTotal'] # e.g. 3921852
Les expressions régulières fonctionnent bien pour ce genre de choses, et pourraient aider avec des différences mineures entre les distributions.
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])
Ce code a fonctionné pour moi sans aucune bibliothèque externe à Python 2.7.9
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'
Nous pouvons facilement obtenir la mémoire utilisée et la mémoire libre
"""
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'