python获取linux的系统信息

内存信息 / meminfo 
返回dict 
#!/usr/bin/env python 
def memory_stat(): 
    mem = {} 
    f = open("/proc/meminfo") 
    lines = f.readlines() 
    f.close() 
    for line in lines: 
        if len(line) < 2: continue 
        name = line.split(':')[0] 
        var = line.split(':')[1].split()[0] 
        mem[name] = long(var) * 1024.0 
    mem['MemUsed'] = mem['MemTotal'] - mem['MemFree'] - mem['Buffers'] - mem['Cached'] 
    return mem 
 
CPU信息 / cpuinfo 
返回list，每核心一dict 
#!/usr/bin/env python 
def cpu_stat(): 
    cpu = [] 
    cpuinfo = {} 
    f = open("/proc/cpuinfo") 
    lines = f.readlines() 
    f.close() 
    for line in lines: 
        if line == 'n': 
            cpu.append(cpuinfo) 
            cpuinfo = {} 
        if len(line) < 2: continue 
        name = line.split(':')[0].rstrip() 
        var = line.split(':')[1] 
        cpuinfo[name] = var 
    return  
 
cpu负载信息 / loadavg 
返回dict 
#!/usr/bin/env python 
def load_stat(): 
    loadavg = {} 
    f = open("/proc/loadavg") 
    con = f.read().split() 
    f.close() 
    loadavg['lavg_1']=con[0] 
    loadavg['lavg_5']=con[1] 
    loadavg['lavg_15']=con[2] 
    loadavg['nr']=con[3] 
    loadavg['last_pid']=con[4] 
    return loadavg 
 
运转时间 / Uptime 
返回dict 
#!/usr/bin/env python 
def uptime_stat(): 
    uptime = {} 
    f = open("/proc/uptime") 
    con = f.read().split() 
    f.close() 
    all_sec = float(con[0]) 
    MINUTE,HOUR,DAY = 60,3600,86400 
    uptime['day'] = int(all_sec / DAY ) 
    uptime['hour'] = int((all_sec % DAY) / HOUR) 
    uptime['minute'] = int((all_sec % HOUR) / MINUTE) 
    uptime['second'] = int(all_sec % MINUTE) 
    uptime['Free rate'] = float(con[1]) / float(con[0]) 
    return uptime 
 
获取网卡流量信息 /proc/net/dev 
返回dict,单位byte 
#!/usr/bin/env python 
def net_stat(): 
    net = [] 
    f = open("/proc/net/dev") 
    lines = f.readlines() 
    f.close() 
    for line in lines[2:]: 
        con = line.split() 
        """ 
        intf = {} 
        intf['interface'] = con[0].lstrip(":") 
        intf['ReceiveBytes'] = int(con[1]) 
        intf['ReceivePackets'] = int(con[2]) 
        intf['ReceiveErrs'] = int(con[3]) 
        intf['ReceiveDrop'] = int(con[4]) 
        intf['ReceiveFifo'] = int(con[5]) 
        intf['ReceiveFrames'] = int(con[6]) 
        intf['ReceiveCompressed'] = int(con[7]) 
        intf['ReceiveMulticast'] = int(con[8]) 
        intf['TransmitBytes'] = int(con[9]) 
        intf['TransmitPackets'] = int(con[10]) 
        intf['TransmitErrs'] = int(con[11]) 
        intf['TransmitDrop'] = int(con[12]) 
        intf['TransmitFifo'] = int(con[13]) 
        intf['TransmitFrames'] = int(con[14]) 
        intf['TransmitCompressed'] = int(con[15]) 
        intf['TransmitMulticast'] = int(con[16]) 
        """ 
        intf = dict( 
            zip( 
                ( 'interface','ReceiveBytes','ReceivePackets', 
                  'ReceiveErrs','ReceiveDrop','ReceiveFifo', 
                  'ReceiveFrames','ReceiveCompressed','ReceiveMulticast', 
                  'TransmitBytes','TransmitPackets','TransmitErrs', 
                  'TransmitDrop', 'TransmitFifo','TransmitFrames', 
                  'TransmitCompressed','TransmitMulticast' ), 
                ( con[0].rstrip(":"),int(con[1]),int(con[2]), 
                  int(con[3]),int(con[4]),int(con[5]), 
                  int(con[6]),int(con[7]),int(con[8]), 
                  int(con[9]),int(con[10]),int(con[11]), 
                  int(con[12]),int(con[13]),int(con[14]), 
                  int(con[15]),int(con[16]), ) 
            ) 
        ) 
 
        net.append(intf) 
    return net 
 
磁盘空间使用 
使用内置python内置函数，返回dict,单位byte 
#!/usr/bin/env python 
def disk_stat(): 
    import os 
    hd={} 
    disk = os.statvfs("/") 
    hd['available'] = disk.f_bsize * disk.f_bavail 
    hd['capacity'] = disk.f_bsize * disk.f_blocks 
    hd['used'] = disk.f_bsize * disk.f_bfree 
    return hd