如何获取Windows系统运行时长？求CMD命令或Python实现方案

一、Shell命令实现（可通过Python调用） #

用PowerShell可以直接计算并输出格式化的运行时长，命令如下：

$bootTime = (Get-CimInstance Win32_OperatingSystem).LastBootUpTime
$uptime = (Get-Date) - $bootTime
$output = "up $($uptime.Days) days, $($uptime.Hours) hours, $($uptime.Minutes) minutes"
Write-Output $output

如果要在CMD中执行，可嵌套调用PowerShell：

powershell -Command "$bootTime=(Get-CimInstance Win32_OperatingSystem).LastBootUpTime;$uptime=(Get-Date)-$bootTime;Write-Output 'up $($uptime.Days) days, $($uptime.Hours) hours, $($uptime.Minutes) minutes'"

Python调用Shell命令获取输出 #

使用subprocess模块执行上述命令并捕获结果：

import subprocess

def get_windows_uptime_shell():
    cmd = '''powershell -Command "$bootTime=(Get-CimInstance Win32_OperatingSystem).LastBootUpTime;$uptime=(Get-Date)-$bootTime;Write-Output 'up $($uptime.Days) days, $($uptime.Hours) hours, $($uptime.Minutes) minutes'"'''
    result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
    if result.returncode == 0:
        return result.stdout.strip()
    else:
        return f"Error: {result.stderr.strip()}"

print(get_windows_uptime_shell())

二、Python原生实现（推荐） #

方案1：使用psutil库（跨平台，简洁） #

psutil是跨平台系统信息库，可直接获取启动时间并计算运行时长：

1. 先安装库（若未安装）：

pip install psutil

2. 实现代码：

import psutil
from datetime import datetime

def get_windows_uptime_psutil():
    boot_time = datetime.fromtimestamp(psutil.boot_time())
    uptime = datetime.now() - boot_time
    days = uptime.days
    hours, remainder = divmod(uptime.seconds, 3600)
    minutes = remainder // 60
    return f"up {days} days, {hours} hours, {minutes} minutes"

print(get_windows_uptime_psutil())

方案2：纯原生Python（无第三方库） #

通过ctypes调用Windows API获取系统运行毫秒数，再转换为格式化时长：

import ctypes
from datetime import timedelta

def get_windows_uptime_native():
    kernel32 = ctypes.WinDLL('kernel32')
    uptime_ms = kernel32.GetTickCount64()
    uptime = timedelta(milliseconds=uptime_ms)
    days = uptime.days
    hours = uptime.seconds // 3600
    minutes = (uptime.seconds % 3600) // 60
    return f"up {days} days, {hours} hours, {minutes} minutes"

print(get_windows_uptime_native())

内容的提问来源于stack exchange，提问作者justanormaluser