Python - psutil Windows权限错误？

Question

我试图使用psutil获取Windows 7上进程的PID，但是我遇到了一个权限错误。我尝试过运行作为管理员运行脚本的命令提示符，但这似乎没有任何效果。错误和相关代码都在下面。错误发生的行是试图使用proc.name访问进程名时发生的。对我如何解决这个问题有建议吗？非常感谢！

错误：

Traceback (most recent call last):
  File "C:\Python33\lib\site-packages\psutil\_psmswindows.py", line 190, in wrapper
    return fun(self, *args, **kwargs)
  File "C:\Python33\lib\site-packages\psutil\_psmswindows.py", line 229, in get_process_exe
    return _convert_raw_path(_psutil_mswindows.get_process_exe(self.pid))
PermissionError: [WinError 5] Access is denied

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "simple_address_retrieve.py", line 14, in <module>
    if proc.name == PROCNAME:
  File "C:\Python33\lib\site-packages\psutil\_common.py", line 48, in __get__
    ret = self.func(instance)
  File "C:\Python33\lib\site-packages\psutil\__init__.py", line 341, in name
    name = self._platform_impl.get_process_name()
  File "C:\Python33\lib\site-packages\psutil\_psmswindows.py", line 190, in wrapper
    return fun(self, *args, **kwargs)
  File "C:\Python33\lib\site-packages\psutil\_psmswindows.py", line 222, in get_process_name
    return os.path.basename(self.get_process_exe())
  File "C:\Python33\lib\site-packages\psutil\_psmswindows.py", line 194, in wrapper
    raise AccessDenied(self.pid, self._process_name)
psutil._error.AccessDenied: (pid=128)

代码：

PROCNAME = "MyProcessName.exe"

for proc in psutil.process_iter():
    if proc.name == PROCNAME:
        print(proc)

Answer 1

get_process_list()不推荐使用psutil.process_iter() 0.6.0。此外，在最新的，直到这个问题似乎是固定的。您还可以继续迭代过程：

for proc in psutil.process_iter():
   try:
       if proc.name == PROCNAME:
          print(proc)
   except (PermissionError, AccessDenied):
       print "Permission error or access denied on process" # can't display name or id here

来自评论的：

...and搜索更多，这似乎是作者不会修复(太复杂)的一个问题：http://groups.google.com/forum/#!topic/psutil/EbdkIGlb4ls。这个答案看起来是最好的方法。但是没有PermissionError，所以只需要捕获AccessDenied

Answer 2

除了psutil.AccessDenied：# windows

示例

def test_children_duplicates(self):
        # find the process which has the highest number of children
        table = collections.defaultdict(int)
        for p in psutil.process_iter():
            try:
                table[p.ppid()] += 1
            except psutil.Error:
                pass
        # this is the one, now let's make sure there are no duplicates
        pid = sorted(table.items(), key=lambda x: x[1])[-1][0]
        p = psutil.Process(pid)
        try:
            c = p.children(recursive=True)
        except psutil.AccessDenied:  # windows
            pass
        else:
            self.assertEqual(len(c), len(set(c))) 

参考文献：iter

def find_process(regex):
    "If 'regex' match on cmdline return number and list of processes with his pid, name, cmdline."
    process_cmd_name = re.compile(regex)
    ls = []
    for proc in psutil.process_iter(attrs=['pid','name','cmdline']):
        try:
            if process_cmd_name.search(str(" ".join(proc.cmdline()))):
                ls.append(proc.info)
        except psutil.AccessDenied:  # windows
            pass
    return (ls)

在psutil.AccessDenied的联想中，列表理解中是否有可能使用？