Method to get the pid number of the process using python

Save as. Py file and run the script after adding the process name such as :python proinfo.py qq to get the qq process information, pay attention to case-insensitive

#-*- encoding:UTF-8 -*-
import os
import sys
import string 
import psutil
import re

def get_pid(name):
　　process_list = psutil.get_process_list()
　　regex = "pid=(d+),sname='" + name + "'"
　　print regex
　　pid = 0
　　for line in process_list:
    process_info = str(line)
    ini_regex = re.compile(regex)
    result = ini_regex.search(process_info)
    if result != None:
        pid = string.atoi(result.group(1))
        print result.group()
        break
def main(argv):<br>　　name = argv[1]<br>　　get_pid(name)

if __name__ == "__main__":
　　main(sys.argv)

Code description:

1. Import psutil needs to be installed to get the list of processes under Linux

process_list = psutil.get_process_list() # Get the list of processes 

2. Import re: python handles regular modules

regex = "pid=(d+),sname='" + name + "'" # composition string A regular expression of type 
ini_regex = re.compile(regex)# Initializes the regular expression 
result = ini_regex.search(process_info)# Regular expression matching 
result.group(0): The contents of the entire string that matches 
result.group(1): Match the first one () The contents of the