How to obtain the process pid using python

Save it as a. py file and run the script to add the process name after it. For example, python proinfo. py qq can obtain the process information of QQ. Note that it is case insensitive.
Copy codeThe Code is as follows: #-*-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 obtain the process list in linux
Copy codeThe Code is as follows: process_list = psutil. get_process_list () # obtain the Process List

2. import re: python's Regular Expression Processing Module
Copy codeThe Code is as follows: regex = "pid = (\ d +), \ sname = \ '" + name + "\'" # A Regular Expression of the string type
Ini_regex = re. compile (regex) # initialize a regular expression
Result = ini_regex.search (process_info) # Regular Expression matching
Result. group (0): the content of the matching string.
Result. group (1): match the content in the first ().