Python获取Linux系统内存情况

import subprocess
import re
 
keydic = {"MemTotal":"总内存(单位G)",
 "MemFree":"剩余内存(单位G)",
 "MemAvailable":"可用内存(单位G)",
 "Cached":"缓存内存(单位G)"}
 
def command(command):
 p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 resultDic = {}
 for line in p.stdout.readlines():
 line = str(line,encoding="utf-8")
 result = re.split("s*",line)
 if result[0][:-1] in keydic:
 resultDic[keydic[result[0][:-1]]] = "%.2f" %(int(result[1])/(1024**2))
 return resultDic
 
if __name__ == "__main__":
 print(command("cat /proc/meminfo"))