Re: How to enable pywin to evaluate -X utf8 flag

That error typically means your Python code raised an exception before 
the service could be started. You probably need some way to track that 
down - eg, some way to discover stdout/stderr from your service - 
win32traceutil etc might help depending on how the service is 
configured. Does the demo itself work? Does it work without the 
command-line mods?

Mark

On 2023-06-06 9:57 a.m., Gualtiero Scotti wrote:
> Thank you Mark for your response, and your explanation.You are right, 
> python.exe is not involved but I thought you handled the flag in your 
> embedded calls..
> When I try to start service it doesn't start and the error message  is:
> *
> Error starting service: The service did not respond to the start or 
> control request in a timely fashion.*
> *
> *
> _svc_name_ = 'XXXXXXXXXXXXXXX' _svc_display_name_ = 
> 'XXXXXXXXXXXXXXXXXXX' _svc_description_ = 'SXXXXXXXXXXXXXXX' 
> _exe_name_ = sys.executable _exe_args_ = '-X utf8 "' + 
> os.path.abspath(__file__) + '"'
> *
> *
> When I take a look to the service on Regedit I've the following situation:
> ImagePath = *"C:\Program Files 
> (x86)\snapp-device-manager-win32\Python\python.exe" -X utf8 
> "C:\Program Files (x86)\xxxxxxxxxxxxxx\winservice_launcher32.py"*
> I can't find any logs about failure.... windows doesn't help me......
> image.png
>
> Thanks in advance for your availability.
> Best regards
>
> Il giorno mar 6 giu 2023 alle ore 15:05 Mark Hammond 
> <[email protected]> ha scritto:
>
>     pythonservice.exe doesn't "wrap" python.exe - it's a stand-alone
>     executable which embeds Python. Thus there's no way to pass a
>     cmd-line param to python.exe as python.exe isn't involved. You
>     could patch pythonservice.exe to handle that arg, then do whatever
>     it is python.exe does with that arg.
>
>     If you told me more about what went wrong with using python.exe as
>     the executable for the service we might be able to work something
>     out there, but "doesn't work" has never been a useful starting point.
>
>     Cheers,
>
>     Mark
>
>     On 2023-06-06 2:56 a.m., Gualtiero Scotti wrote:
>>     HI Mark and Hi all,
>>     as I wrote previously Mark's solution did not work for me. I need
>>     pythonsevice.exe is able to pass -X utf8 parameter to python
>>     interpreter or in alternative is able to evaluate evaluate the
>>     environment variable PYTHONUTF8=1. Any suggestions?
>>     Please help me.
>>     Thanks in advance
>>
>>
>>     Il giorno lun 5 giu 2023 alle ore 10:51 Gualtiero Scotti
>>     <[email protected]> ha scritto:
>>
>>         HI Mark,
>>         I've tried your solution but it doesn't work. When calling
>>         python directly, service fails to start.
>>         When i use
>>         #_exe_name_ = sys.executable #_exe_args_ = ' -X utf8 ' + '"'
>>         + os.path.abspath(sys.argv[0]) + '"'
>>         service are directly linked to my python app without using
>>         pythonservice.exe. ( I saw this on Regedit)
>>
>>         _As you wrote on your example:_
>>         _
>>         _
>>
>>         # This is an example of a service hosted by python.exe rather
>>         than
>>         # pythonservice.exe.
>>
>>         # *Note that it is very rare that using python.exe is a
>>         better option*
>>         # than the default pythonservice.exe - the latter has better
>>         error handling
>>         # so that if Python itself can't be initialized or there are
>>         very early
>>         # i*mport errors, you will get error details written to the
>>         event log*.  When
>>         # using python.exe instead, you are forced to wait for the
>>         interpreter startup
>>         # and imports to succeed before you are able to effectively
>>         setup your own
>>         # error handling.
>>
>>         *# So in short, please make sure you *really* want to do
>>         this, otherwise just
>>         # stick with the default.*
>>         *
>>         *
>>          I need to use pythonservice.exe but I don't understand how
>>         it wraps my python application. Is there a way to tell to
>>         pythonservice.exe to call python with some interpreter arguments?
>>         Thanks in advance.
>>         *
>>         *
>>
>>         Il giorno gio 1 giu 2023 alle ore 17:05 Mark Hammond
>>         <[email protected]> ha scritto:
>>
>>             https://github.com/mhammond/pywin32/blob/main/win32/Demos/service/nativePipeTestService.py
>>             is a demo of using a service using python.exe and
>>             supports specifying the command-line, so that might be an
>>             option?
>>
>>             Mark
>>
>>             On 2023-06-01 5:28 a.m., Gualtiero Scotti wrote:
>>>             Hi, I need to start my python application through
>>>             windows service. For this purpose I use pywin32.
>>>             I'm not able to make a Python instance to evaluate the
>>>             -X uf8 flag.
>>>
>>>             This flag must be passed during python invocation only
>>>             and not when it is already started.
>>>             After some investigations I've found the service launch
>>>             *pythonservice.exe* wrapper but I don't know how to pass
>>>             the flag to the Python interpreter.
>>>
>>>             Is there another option to set this flag? It is possible
>>>             to set an env variable *PYTHONUTF8=1 * but
>>>             pythonservice.exe doesn't seem to evaluate it...
>>>             *
>>>             *
>>>             *My environment*
>>>             *- Windows 11 Home 22H2*
>>>             *- Python 3.11.1* (tags/v3.11.1:a7a450f, Dec  6 2022,
>>>             19:43:28) [MSC v.1934 32 bit (Intel)] on win32
>>>             - *Pywin32 305*
>>>             - *Pywin32-ctypes 0.2.0*
>>>
>>>             *Python documentation*
>>>
>>>
>>>                 4.7. UTF-8 mode¶
>>>                 <https://docs.python.org/3/using/windows.html#utf-8-mode>
>>>
>>>             New in version 3.7.
>>>
>>>             Windows still uses legacy encodings for the system
>>>             encoding (the ANSI Code Page). Python uses it for the
>>>             default encoding of text files (e.g.
>>>             |locale.getencoding()|
>>>             <https://docs.python.org/3/library/locale.html#locale.getencoding>).
>>>
>>>             This may cause issues because UTF-8 is widely used on
>>>             the internet and most Unix systems, including WSL
>>>             (Windows Subsystem for Linux).
>>>
>>>             You can use the Python UTF-8 Mode
>>>             <https://docs.python.org/3/library/os.html#utf8-mode> to
>>>             change the default text encoding to UTF-8. You can
>>>             enable the Python UTF-8 Mode
>>>             <https://docs.python.org/3/library/os.html#utf8-mode> via
>>>             the |-X utf8| command line option, or the
>>>             |PYTHONUTF8=1| environment variable. See |PYTHONUTF8|
>>>             <https://docs.python.org/3/using/cmdline.html#envvar-PYTHONUTF8> for
>>>             enabling UTF-8 mode, and Excursus: Setting environment
>>>             variables
>>>             <https://docs.python.org/3/using/windows.html#setting-envvars> for
>>>             how to modify environment variables.
>>>
>>>             When the Python UTF-8 Mode
>>>             <https://docs.python.org/3/library/os.html#utf8-mode> is
>>>             enabled, you can still use the system encoding (the ANSI
>>>             Code Page) via the “mbcs” codec.
>>>
>>>             Note that adding |PYTHONUTF8=1| to the default
>>>             environment variables will affect all Python 3.7+
>>>             applications on your system. If you have any Python 3.7+
>>>             applications which rely on the legacy system encoding,
>>>             it is recommended to set the environment variable
>>>             temporarily or use the |-X utf8| command line option.
>>>
>>>             Note
>>>
>>>             Even when UTF-8 mode is disabled, Python uses UTF-8 by
>>>             default on Windows for:
>>>
>>>              *
>>>
>>>                 Console I/O including standard I/O (see *PEP 528*
>>>                 <https://peps.python.org/pep-0528/> for details).
>>>
>>>              *
>>>
>>>                 The filesystem encoding
>>>                 <https://docs.python.org/3/glossary.html#term-filesystem-encoding-and-error-handler> (see
>>>                 *PEP 529* <https://peps.python.org/pep-0529/> for
>>>                 details).
>>>
>>>             from -> https://docs.python.org/3/using/windows.html
>>>
>>>             Please help me!
>>>             Thanks in advance
>>>             *
>>>             *
>>>
>>>             _______________________________________________
>>>             python-win32 mailing list
>>>             [email protected]
>>>             https://mail.python.org/mailman/listinfo/python-win32
>>

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