Python writes a monitor script similar to top

Recently the boss presented a need, the project needs are roughly as follows:

1, using Raspberry Pi as a gateway, the bottom of a plurality of ZigBee sensor nodes, the gateway to the ZigBee sensor node collected information through the serial port to receive the summary, and sent to the upper HTTP Server;

2, to have the data of the reverse control channel, that is, the gateway and the server to maintain a long connection, using WebSocket implementation, in order to achieve the ZigBee sensor node to send control commands to achieve the remote configuration of ZigBee node operation;

3, the Raspberry Pi gateway itself to interact with the upper server, the upper server can see the gateway real-time CPU, memory and network upstream and downstream bandwidth, and so on;

The first two requirements in the previous period of time has been basically realized, and so on after the time to improve in the collation, today recorded a third of the implementation process.

Feel the third demand is similar to the current company to use the monitoring system of a small bottom-level implementation, because a few days ago bored just took a zabbix environment to play, feel the boss's needs in the front-end seems to resemble the Zabbix server on the kind of presentation form, But with Zabbix really feel not flexible, in fact, I also do not understand, can only achieve a similar to the top tool of the Monitoring script bar, first real-time CPU, memory, network traffic and other information in the local display, waiting for follow-up and server side of the friend, the code is as follows:

#!/usr/bin/env python#-*-coding:utf-8-*-##############################__author__ = ' Webber ' ##create at 2016/12/12 ##############################ImportOSImportSYSImport Timedefcpuinfo ():"""get cpuinfo from '/proc/stat ' and calculate the percentage of the CPU occupy. """F= Open ('/proc/stat','R') CPU=f.readline () f.close ( )#print "Cpuinfo:", CPUCPU = Cpu.split (" ") Total=0 usr= Float (cpu[2])#user-state CPU usage_sys = float (cpu[4])#CPU usage in kernel State     forInfoinchCPU:ifinfo.isdigit (): Total+=Float (info)Print '\033[31mcpu Info: \033[0m',    Print 'usr:%.5f%%'% ((usr/total) *100),    Print 'SYS:%.5f%%'% ((_sys/total) *100)defmeminfo ():"""get meminfo from '/proc/meminfo ' and calculate the percentage of the mem occupy used = Total-free-buffer S-cached"""F= Open ('/proc/meminfo','R') Mem=f.readlines () f.close ( )#print "Meminfo", MemTotal, free, buffers, cached =0, 0, 0, 0 forInfoinchMem:mem_item=Info.lower (). Split ()#Print Mem_item        ifMem_item[0] = ='memtotal:': Total= Float (mem_item[1])        ifMem_item[0] = ='Memfree:': Free= Float (mem_item[1])        ifMem_item[0] = ='buffers:': Buffers= Float (mem_item[1])        ifMem_item[0] = ='Cached:': Cached= Float (mem_item[1]) used= Total-free-buffers-CachedPrint "\033[31mmeminfo: \033[0m",    Print "total:%.2f GB"% (total/1024/1024),    Print "used:%.5f%%"% (used/Total )defNetInfo ():"""Get Real-time bandwidth"""F= Open ('/proc/net/dev','R') Net=f.readlines () f.close () Net_item= []     forInfoinchNet:ifInfo.strip (). StartsWith ("eth0"): Net_item=Info.strip (). Split () Break    #Print Net_itemrecv = Float (net_item[1]) Send= Float (net_item[9])    #print "recv:%s"% recv    #print "send:%s"% sendTime.sleep (1) F2= Open ('/proc/net/dev','R') _net=f2.readlines () f2.close () _net_item= []     forInfoinch_net:ifInfo.strip (). StartsWith ("eth0"): _net_item=Info.strip (). Split () Breakrecv_2= Float (_net_item[1]) Send_2= Float (_net_item[9])    #print "recv_2:%s"% recv_2    #print "send_2:%s"% send_2    Print "\033[31m Network info: \033[0m"    Print "Received:%.3f kb/s"% (recv_2/1024-recv/1024)    Print "transmit:%.3f kb/s"% (send_2/1024-send/1024)defloadavg ():Passdefdisk ():Passif __name__=='__main__':     whileTrue:Try: Os.system ('Clear') Cpuinfo ()Print "=============================================="Meminfo ()Print "##############################################"NetInfo () time.sleep (5)        exceptKeyboardinterrupt, E:#This can also be handled with a signal function.            Print "'            Print "Bye-bye"sys.exit (0)

Python writes a monitor script similar to top