我试图运行一个python程序,用Anaconda编写,作为Windows服务。复杂的是我想从一个特定的conda虚拟环境运行Windows服务。我们的想法是,在未来,我们可能会开发更多基于python的windows服务,这些服务可能有不同的模块依赖关系,因此将每个服务保持在自己的虚拟环境中是理想的。在
我找到了几篇关于python和windows服务优秀的文章。我创建了一个非常简单的测试程序,在服务启动后将一些消息写入文本文件。我可以成功地将这个测试python程序安装为windows服务,并且可以在我的文件中看到各种文本消息。但是,当我尝试将诸如Numpy或TensorFlow之类的模块导入到我的简单测试python程序中时,服务将无法启动,并且我收到了无法找到它们各自的DLL的失败消息。在
我确信问题是因为所需的conda虚拟环境尚未激活。同时,我尝试在系统级别复制各种conda环境变量;尝试将所有必需的python库路径从虚拟环境添加到系统路径和系统范围的python路径,但是没有成功。在
我怀疑,如果能将conda虚拟环境作为python代码的一部分来激活,就可以解决问题了。(我也怀疑在我的基本配置中安装所有必需的模块可以解决问题,但我希望避免这种情况)。在
这是我写的小测试程序。这个程序可以很好地与诸如sys、os等基本Python模块配合使用。当我尝试运行它并包含Numpy或TensorFlow时,它失败并显示以下错误消息: (这是在我尝试并启动我的服务后从Windows事件查看器中获得的-该服务安装正确):
Python无法导入服务的模块 回溯(最近一次呼叫): 文件“D:\TFS\Projects\DEV\AEPEnrollmentForms\src\aepenrl\Windows\u服务_示例.py“,第35行,英寸 将numpy作为np导入 文件“C:\Users\pboerner\AppData\Local\conda\conda\envs\aepenr\lib\site packages\numpy_yuinit_u.py”,第140行,in 从。导入分发服务器初始化 文件“C:\Users\pbooner\AppData\Local\conda\conda\envs\aepenr\lib\site packages\numpy_分发服务器_初始py“,第34行,英寸 从。导入 ImportError:DLL加载失败:找不到指定的模块。 %2: %3个
下面是简单测试程序的代码。(我大部分的Windows服务集成工作都来自Davide Mastromatteo提供的一篇优秀文章)
import numpy as np
import socket
import sys
import time
import win32serviceutil
import servicemanager
import win32event
import win32service
class SimpleService(win32serviceutil.ServiceFramework):
'''Base class to create winservice in Python'''
_svc_name_ = 'TestPythonSrvc'
_svc_display_name_ = 'Test Python Service'
_svc_description_ = 'Test to see how to create a windows service with python'
@classmethod
def parse_command_line(cls):
'''
ClassMethod to parse the command line
'''
win32serviceutil.HandleCommandLine(cls)
def __init__(self, args):
'''
Constructor of the winservice
'''
self.isrunning=True
self.fid = open("D:\\temp\\simple_service.txt", "w")
self.fid.write("Initialize\n")
self.fid.flush()
win32serviceutil.ServiceFramework.__init__(self, args)
self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
socket.setdefaulttimeout(60)
def SvcStop(self):
'''
Called when the service is asked to stop
'''
self.stop()
self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
win32event.SetEvent(self.hWaitStop)
def SvcDoRun(self):
'''
Called when the service is asked to start
'''
self.start()
servicemanager.LogMsg(servicemanager.EVENTLOG_INFORMATION_TYPE,
servicemanager.PYS_SERVICE_STARTED,
(self._svc_name_, ''))
self.main()
def start(self):
'''
Override to add logic before the start
eg. running condition
'''
self.isrunning = True
self.fid.write("Start method called\n")
self.fid.flush()
def stop(self):
'''
Override to add logic before the stop
eg. invalidating running condition
'''
self.isrunning = False
self.fid.write("STOP method called. Setting stop flag\n")
self.fid.flush()
def main(self):
'''
Main class to be ovverridden to add logic
'''
a = np.zeros((100,1))
while True:
if self.isrunning:
self.fid.write(f"Tick. Numpy array shape {a.shape}\n")
self.fid.flush()
time.sleep(1)
else:
self.fid.write("Breaking out of main loop\n")
self.fid.flush()
break;
self.fid.write("Closing the log file\n")
self.fid.flush()
self.fid.close()
if __name__ == '__main__':
# This code block was required to get this simple service example to run
# on a Windows 10 laptop with Admin privs. Only calling the
# HandleCommandLine method alone didn'd seem to work. Not sure why but this
# code was provided as a solution on the Web.
if len(sys.argv) == 1:
servicemanager.Initialize()
servicemanager.PrepareToHostSingle(SimpleService)
servicemanager.StartServiceCtrlDispatcher()
else:
win32serviceutil.HandleCommandLine(SimpleService)
目前没有回答
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