python在windows系统上获取内存占用率

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import subprocess
import re
def get_memory_usage():
    # 执行 WMIC 命令并获取内存占用信息
    可用物理内存_info = subprocess.check_output("wmic OS get FreePhysicalMemory", shell=True).decode()
    总可见内存大小_info = subprocess.check_output("wmic OS get TotalVisibleMemorySize", shell=True).decode()
    # 使用正则表达式提取 FreePhysicalMemory 和 TotalVisibleMemorySize 的值
    free_memory = re.search(r'([0-9]+)', 可用物理内存_info).group(0)
    total_memory = re.search(r'([0-9]+)', 总可见内存大小_info).group(0)
    # 计算内存占用百分比
    try:
        memory_usage_percent_data = (1 - int(free_memory) / int(total_memory)) * 100
        memory_usage_percent='{:.3f}'.format(memory_usage_percent_data)
        return str(memory_usage_percent)+'%'
    except ZeroDivisionError:
        print("Error: Division by zero is not allowed.不允许除以零。")
        return None  # 或者可以设置为某个特定的错误代码或消息

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