在Windows上运行python脚本作为服务时，拒绝读取文件的权限

Question

我正在尝试将python中的一个项目作为windows服务运行。它可以作为前台进程和服务运行。当我们把它作为前台进程运行时，一切都很好。但是当我们将它作为服务运行时，它会给一个甚至被前台进程使用的文件配置文件的权限拒绝错误。 是的，我以管理员的身份运行它。 以下是windows服务的代码：

# Python script to run tevico_scanner as a windows service
# We are using pywin32 python extension modules for windows.

import servicemanager
import win32event
import win32service
import win32serviceutil

from tevico_scanner import constants
from tevico_scanner import watchman


class WindowsService(win32serviceutil.ServiceFramework):

    # Service name that we use to start/stop the service
    _svc_name_ = "<service_name>"

    # Service Display Name
    _svc_display_name_ = "<service_display_name>"

    # Description for our scanner
    _svc_service_description_ = "<description>"

    config_file = constants.DEFAULT_CFG_FILE

    def __init__(self, args):
        win32serviceutil.ServiceFramework.__init__(self, args)
        self.wman = watchman.Watchman(self.config_file)

        self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)

    def SvcDoRun(self):
        # Run our watchman
        watchman._CW_FLAG = False
        watchman._DEBUGGING = False
        self.wman.run()

    def SvcDoStop(self):
        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
        win32event.SetEvent(self.hWaitStop)


if __name__ == '__main__':
    win32serviceutil.HandleCommandLine(WindowsService)

错误消息：

^{pr2}$

谢谢。在