Fwd: [PyInstaller] --noconsole on Windows and subprocess call

[Tomas Melin]

Hi,

I'm facing similar kind of problems although a bit different.

In my case, the subprocess opens a new window on its own and the
pyinstaller -noconsole option does not seem to apply to that window.
In addition to the new window that I want, I get an additional empty
terminal window. The solution as suggested by Bryan does not work
since I actually want the window to stay open, but I don't want the
console.

Any ideas on how to handle that case so that the -noconsole also
applies to any windows opened by subprocesses?

Windows 7
Python 2.6.2
PyInstaller 2.1


Thankful for any help.
BR,
Tomas Melin



>Re: [PyInstaller] --noconsole on Windows and subprocess call
>
>Bryan A. Jones Fri, 24 Jan 2014 14:33:47 -0800
>
>All,
>
>Another programmer helped me find a nice approach that still uses the newer
>subprocess module. Is there a good place to post this on the Pyinstaller
>site? I hope that it can help others who stumble across the same problem.
>This works directly from Python, and from the pyinstaller binary, and from
>the pyinstaller binary when using --noconsole.
>
>
>import subprocess
>with open('out.txt', 'w') as f:
> try:
> si = subprocess.STARTUPINFO()
> si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
> h = subprocess.check_output(['python', '--help'],
> stdin=subprocess.PIPE,
> stderr=subprocess.PIPE,
> startupinfo=si)
> f.write(h)
> except OSError as e:
> f.write('Failed: ' + str(e))
>
>
>On Sat, Jan 11, 2014 at 1:47 PM, Michael Hipp <hip...@gmail.com> wrote:
>
>> Have you tried calling it something like this:
>> Popen(cmd, creationflags=win32process.CREATE_NO_WINDOW)
>>
>>
>> On Fri, Jan 10, 2014 at 3:00 PM, Bryan A. Jones <bjo...@ece.msstate.edu>wrote:
>>
>>> All,
>>>
>>> I'm stuck with a Pyinstaller problem (Windows 7, latest pyinstaller from
>>> git, Python 2.7). I'd like to create an application without a console
>>> window, so I pass --noconsole to pyinstaller. However, I also call some
>>> external programs from my application, which is causing problems:
>>>
>>> 1. If I use subprocess.call and friends, I get the exception OSError
>>> exception "[Error 6] the handle is invalid." This is because a noconsole
>>> app has no stdin/stdout/stderr; by default, subprocess tries to pass these
>>> on to the child process, which fails.
>>> 2. If I use subprocess.call with stdin=PIPE, stdout=PIPE, stderr=PIPE
>>> (which opens a pipe between the child process and my parent Python
>>> process), everything works, but I get a command window that appears
>>> briefly
>>> on the screen. Because I call this child process a lot, I see a lot of
>>> distracting consoles opening and closing.
>>> 3. Trying op.spawnl produces identical results to #2.
>>>
>>> All the code works fine when running without --noconsole or running
>>> directly from Python. Any ideas on how to run a child subprocess
>>> successfully, but without opening a console window?
>>>
>>> Thanks!
>>>
>>> Bryan
>>> --
>>> Bryan A. Jones, Ph.D.
>>> Associate Professor
>>> Department of Electrical and Computer Engineering
>>> 231 Simrall / PO Box 9571
>>> Mississippi State University
>>> Mississippi state, MS 39762
>>> http://www.ece.msstate.edu/~bjones
>>> bjones AT ece DOT msstate DOT edu
>>> voice 662-325-3149
>>> fax 662-325-2298
>>>
>>> Our Master, Jesus Christ, is on his way. He'll show up right on
>>> time, his arrival guaranteed by the Blessed and Undisputed Ruler,
>>> High King, High God.
>>> - 1 Tim. 6:14b-15 (The Message)
>>>
>>> --
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>>>
>>
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>>
>
>
>
>--
>Bryan A. Jones, Ph.D.
>Associate Professor
>Department of Electrical and Computer Engineering
>231 Simrall / PO Box 9571
>Mississippi State University
>Mississippi state, MS 39762
>http://www.ece.msstate.edu/~bjones
>bjones AT ece DOT msstate DOT edu
>voice 662-325-3149
>fax 662-325-2298
>
>Our Master, Jesus Christ, is on his way. He'll show up right on
>time, his arrival guaranteed by the Blessed and Undisputed Ruler,
>High King, High God.
>- 1 Tim. 6:14b-15 (The Message)
>
>--
>You received this message because you are subscribed to the Google Groups
>"PyInstaller" group.
>To unsubscribe from this group and stop receiving emails from it, send an email
>to pyinstaller+unsubscr...@googlegroups.com.
>To post to this group, send email to pyins...@googlegroups.com.
>Visit this group at http://groups.google.com/group/pyinstaller.
>For more options, visit https://groups.google.com/groups/opt_out.
>
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> [PyInstaller] --noconsole on Windows and subprocess call Bryan A. Jones
> Re: [PyInstaller] --noconsole on Windows and subproce... Martin Zibricky
> Re: [PyInstaller] --noconsole on Windows and subp... Bryan A. Jones
> Re: [PyInstaller] --noconsole on Windows and subproce... Michael Hipp
> Re: [PyInstaller] --noconsole on Windows and subp...Bryan A. Jones
> Re: [PyInstaller] --noconsole on Windows and ... Michael Hipp
> Re: [PyInstaller] --noconsole on Windows ... Bryan A. Jones
> Re: [PyInstaller] --noconsole on Win... Steve Barnes
> Re: [PyInstaller] --noconsole on... Bryan A. Jones
> Re: [PyInstaller] --noconsol... Steve Barnes
> Re: [PyInstaller] --noconsol... Bryan A. Jones
> Re: [PyInstaller] --noconsol... Steve Barnes
>

[tomas....@gmail.com]

All,

For me, setting subprocess popen argument shell=True helped. That will keep the console window from popping up but allows any further windows created by the subprocess to show up correctly on screen. Using STARTUPINFO() directly made all subprocess windows hidden.

        gpl = subprocess.Popen("application",stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE, shell=True)

So eventually this was a python issue rather than a pyinstaller issue. It just showed up only when using the application packed as a exe file.

Tomas

[Trevor Kirkby]

Shell=True has occasionally dangerous issues, however I don't think you should run into any of them.

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