Python 获取操作系统用户进程详细信息

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Python是一种高级编程语言，它可以用于获取操作系统用户进程的详细信息。在本文中，我们将介绍如何使用Python获取操作系统用户进程的详细信息。

1. 安装psutil模块

在Python中获取操作系统用户进程的详细信息需要使用psutil模块。可以使用以下命令在终端中安装psutil模块：

pip install psutil

2. 获取进程列表

可以使用以下代码获取当前操作系统中所有进程的详细信息：

import psutil

processes = []

for process in psutil.process_iter():
    try:
        process_info = process.as_dict(attrs=['pid', 'name', 'username', 'cpu_percent', 'memory_info'])
        processes.append(process_info)
    except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
        pass

print(processes)

以上代码将获取所有进程的pid、name、username、cpu_percent和memory_info信息，并将其存储在名为processes的列表中。

3. 获取单个进程的详细信息

可以使用以下代码获取特定PID进程的详细信息：

import psutil

pid = 22272
process = psutil.Process(pid) # 如果PID不存在，则报错：psutil.NoSuchProcess: process PID not found (pid=1234)
process_info = process.as_dict(attrs=['pid', 'name', 'username', 'cpu_percent', 'memory_info'])

print(process_info)

以上代码将获取PID为1234的进程的pid、name、username、cpu_percent和memory_info信息，并将其打印到终端。

{'username': 'DESKTOP-2N10T7M\\Administrator', 'cpu_percent': 0.0, 'name': 'chrome.exe', 'memory_info': pmem(rss=38707200, vms=15835136, num_page_faults=81419, peak_wset=63057920, wset=38707200, peak_paged_pool=710872, paged_pool=591064, peak_nonpaged_pool=301184, nonpaged_pool=20872, pagefile=15835136, peak_pagefile=55029760, private=15835136), 'pid': 22272}

示例：获取操作系统用户进程详细信息
包括：进程状态、名称、CPU占用率、进程ID、内存占用率、进程CMDLine、进程所属用户、进程所处路径、启动时间、进程磁盘IO
【扩展：还可获取进程网络资源使用率】

class SystemInfo(object):
    """
    Get operating system information
    """
    def __init__(self):
        pass

    def process_info(self):
        """
        :return: A list of all process details of the system
        """
        proc, all_processes = [],  psutil.process_iter()
        for items in all_processes:
            try:
                procinfo = items.as_dict(attrs=["pid", "name"])
                try:
                    #the process start path
                    p_path_cwd = items.cwd().decode("gbk")

                    #the process accounts for system memory uasge
                    proc_mem_percent = items.memory_percent()

                    #the process starts cmdline content
                    cmdlines = str(items.cmdline())

                    #the process accounts for system CPU usage
                    cpu_percent = items.cpu_percent(interval=1)
                except Exception as e:
                    try:
                        p_path_cwd = items.exe()
                    except Exception as e: p_path_cwd = e.name
                p_status, p_create_time, proc_user, proc_io_info = items.status(), items.create_time(),items.username() , {}

                try:
                    proc_io = items.io_counters()
                    proc_io_info["ReadCount"] = proc_io.read_count
                    proc_io_info["WriteCount"] = proc_io.write_count
                    proc_io_info["ReadBytes"] = proc_io.read_bytes
                    proc_io_info["WriteBytes"] = proc_io.write_bytes
                except Exception:pass
                procinfo.update({"path": p_path_cwd,
                                 "cmdline":cmdlines,
                                 "cpu_percent":cpu_percent,
                                 "status": p_status,
                                 "CreateTime": p_create_time,
                                 "MemPercent": proc_mem_percent,
                                 "user": proc_user,
                                 "DiskIo": proc_io_info})
            except Exception:pass
            finally:
                proc.append(procinfo)
        return proc
    
if __name__ == '__main__':
    SystemInfo().process_info()

Linux部分实例结果：
[{'status': 'running', 'name': 'python', 'cpu_percent': 0.0, 'pid': 4451, 'MemPercent': 0.3388184396693485, 'cmdline': "['python', 'process_info.py']", 'user': 'root', 'path': u'/opt/temp', 'CreateTime': 1498617080.89, 'DiskIo': {'ReadCount': 3598, 'WriteCount': 0, 'ReadBytes': 430080, 'WriteBytes': 0}},
{'status': 'sleeping', 'name': 'tuned', 'cpu_percent': 0.0, 'pid': 1049, 'MemPercent': 0.5671346113520732, 'cmdline': "['/usr/bin/python', '-Es', '/usr/sbin/tuned', '-l', '-P']", 'user': 'root', 'path': u'/', 'CreateTime': 1498616948.98, 'DiskIo': {'ReadCount': 1043, 'WriteCount': 71, 'ReadBytes': 2007040, 'WriteBytes': 12288}},
{'status': 'sleeping', 'name': 'jzagent', 'cpu_percent': 0.0, 'pid': 2904, 'MemPercent': 0.02069330861172731, 'cmdline': "['/opt/jzagent/jzagent', 'terminal']", 'user': 'root', 'path': u'/', 'CreateTime': 1498616960.4, 'DiskIo': {'ReadCount': 9, 'WriteCount': 0, 'ReadBytes': 1941504, 'WriteBytes': 0}}]

windows部分实例结果：
[{'status': 'running', 'name': 'python.exe', 'cpu_percent': 0.0, 'pid': 12120, 'MemPercent': 0.15557206974991283, 'cmdline': "['C:\\\\Python27\\\\python.exe', 'E:/codes/Python_codes/process_info.py']", 'user': u'DESKTOP-MVTK6UK\\SteveRocket', 'path': u'E:\\codes\\Python_codes', 'CreateTime': 1498615524.0, 'DiskIo': {'ReadCount': 165L, 'WriteCount': 0L, 'ReadBytes': 618846L, 'WriteBytes': 0L}},
{'status': 'running', 'name': 'python.exe', 'cpu_percent': 1.6, 'pid': 16112, 'MemPercent': 0.3357386080591733, 'cmdline': "['C:\\\\Python27\\\\python.exe', 'run.py', 'python_application']", 'user': u'DESKTOP-MVTK6UK\\SteveRocket', 'path': u'E:\\application_api', 'CreateTime': 1498614632.0, 'DiskIo': {'ReadCount': 1061L, 'WriteCount': 20L, 'ReadBytes': 4474306L, 'WriteBytes': 1299L}}]

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Python 获取操作系统用户进程详细信息

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