python 查看端口占用

import subprocess

def check_port(ip, port):
    cmd = f'lsof -i:{port} | grep LISTEN'
    result = subprocess.run(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    if result.returncode == 0:
        print(f"Port {port} is in use.")
    else:
        print(f"Port {port} is free.")

check_port('127.0.0.1', 8080)

import subprocess

def check_port(ip, port):
    cmd = f'netstat -ano | findstr :{port}'
    result = subprocess.run(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    if result.returncode == 0:
        print(f"Port {port} is in use.")
    else:
        print(f"Port {port} is free.")

check_port('127.0.0.1', 8080)

pip install psutil

import psutil

def check_port(ip, port):
    for conn in psutil.net_connections(kind='inet'):
        if conn.laddr.ip == ip and conn.laddr.port == port:
            print(f"Port {port} is in use by process {conn.pid}.")
            return
    print(f"Port {port} is free.")

check_port('127.0.0.1', 8080)

import socket

def check_port(ip, port):
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        try:
            s.bind((ip, port))
            print(f"Port {port} is free.")
        except OSError:
            print(f"Port {port} is in use.")

check_port('127.0.0.1', 8080)