Re: Send alt key to subprocess.PIPE stdin

2013-09-12 Thread Wanderer 
On Wednesday, September 11, 2013 4:23:57 PM UTC-4, Dave Angel wrote:
 On 11/9/2013 10:26, Wanderer wrote:
 
 
 
  How do I send the command 'Alt+D' to subprocess.PIPE?
 
 
 
 That's not a command, it's a keystroke combination.  And without knowing
 
 what RSConfig.exe is looking to get its keystrokes, it might not even be
 
 possible to feed it any keystrokes via the pipe.
 
 
 
 if the program does indeed use stdin, there's no portable encoding for
 
 Alt-D.  But if your program only runs on one particular platform, you
 
 might be able to find docs for that platform that explain it.
 
 
 
 
 
  My code is
 
 
 
  import subprocess
 
  rsconfig = subprocess.Popen([C:\Program 
  Files\Photometrics\PVCam64\utilities\RSConfig\RSConfig.exe, 
  ],stdin=subprocess.PIPE)
 
 
 
 That string will only work by accident.  You need to make it a raw
 
 string, or use forward slashes, or double them.  As it happens, with
 
 this PARTICULAR set of directories, you won't get into trouble with
 
 Python 2.7.3
 
 
 
 
 
 
 
 -- 
 
 DaveA

Thanks, I didn't know that. I thought there would be some \n \t kind of 
combination or a unicode string for all the key combinations on my keyboard.
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Re: Send alt key to subprocess.PIPE stdin

2013-09-12 Thread Chris Angelico 
On Fri, Sep 13, 2013 at 12:06 AM, Wanderer wande...@dialup4less.com wrote:
 Thanks, I didn't know that. I thought there would be some \n \t kind of 
 combination or a unicode string for all the key combinations on my keyboard.

Unicode identifies every character, but keystrokes aren't characters.
Consider, for instance, the difference between the keypress Shift+A
and the letter produced - even in the most simple ASCII-only US-only
situation, that could produce either A or (if Caps Lock is active)
a. So if you actually want to trigger Shift+A, you can't represent
that with a character. Controlling a GUI app has to be done with
keystrokes, so it needs a GUI controlling tool.

That said, though: These sorts of keystrokes often can be represented
with escape sequences (I just tried it in xterm and Alt-D came out as
\e[d), so you could control a console program using sequences that
you could put into a string. But that's not true of your typical GUI
system.

ChrisA
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Re: Send alt key to subprocess.PIPE stdin

2013-09-12 Thread Nobody 
On Fri, 13 Sep 2013 01:27:53 +1000, Chris Angelico wrote:

 That said, though: These sorts of keystrokes often can be represented
 with escape sequences (I just tried it in xterm and Alt-D came out as
 \e[d),

Technically, that would be Meta-D (even if your Meta key has Alt printed
on it).

Alt-char produces chr(ord(char)+128); Meta-char produces \e+char.

At least, that's the historical distinction between Meta and Alt. With
xterm, the behaviour is configurable via the resources altIsNotMeta,
altSendsEscape and metaSendsEscape.

None of which has anything to do with trying to feed a GUI program key
events via stdin ...

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Send alt key to subprocess.PIPE stdin

2013-09-11 Thread Wanderer 
How do I send the command 'Alt+D' to subprocess.PIPE?

My code is

import subprocess
rsconfig = subprocess.Popen([C:\Program 
Files\Photometrics\PVCam64\utilities\RSConfig\RSConfig.exe, 
],stdin=subprocess.PIPE)

rsconfig.stdin.write('Alt+D')

Thanks
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Re: Send alt key to subprocess.PIPE stdin

2013-09-11 Thread Nobody 
On Wed, 11 Sep 2013 07:26:32 -0700, Wanderer wrote:

 How do I send the command 'Alt+D' to subprocess.PIPE?

You don't. GUI programs don't read stdin, they receive key press events
from the windowing system.

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Re: Send alt key to subprocess.PIPE stdin

2013-09-11 Thread Gary Herron 

On 09/11/2013 07:26 AM, Wanderer wrote:

How do I send the command 'Alt+D' to subprocess.PIPE?

My code is

import subprocess
rsconfig = subprocess.Popen([C:\Program 
Files\Photometrics\PVCam64\utilities\RSConfig\RSConfig.exe, ],stdin=subprocess.PIPE)

rsconfig.stdin.write('Alt+D')

Thanks


That question doesn't really make sense.  A pipe provides a method to 
transfer a stream of bytes.  You could indeed send that byte across the 
pipe, but it's just a byte, written by one process and read by another 
process.  The receiving process can examine the byte stream, and do 
whatever it wants in response.


By calling it a _command_, you seem to expect some particular behavior 
out of the receiving process.  Please tell us *what* that might be, and 
we'll see what we can do to help out.


Gary Herron



--
Dr. Gary Herron
Department of Computer Science
DigiPen Institute of Technology
(425) 895-4418

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Re: Send alt key to subprocess.PIPE stdin

2013-09-11 Thread Wanderer 
On Wednesday, September 11, 2013 1:43:09 PM UTC-4, Gary Herron wrote:
 On 09/11/2013 07:26 AM, Wanderer wrote:
 
  How do I send the command 'Alt+D' to subprocess.PIPE?
 
 
 
  My code is
 
 
 
  import subprocess
 
  rsconfig = subprocess.Popen([C:\Program 
  Files\Photometrics\PVCam64\utilities\RSConfig\RSConfig.exe, 
  ],stdin=subprocess.PIPE)
 
 
 
  rsconfig.stdin.write('Alt+D')
 
 
 
  Thanks
 
 
 
 That question doesn't really make sense.  A pipe provides a method to 
 
 transfer a stream of bytes.  You could indeed send that byte across the 
 
 pipe, but it's just a byte, written by one process and read by another 
 
 process.  The receiving process can examine the byte stream, and do 
 
 whatever it wants in response.
 
 
 
 By calling it a _command_, you seem to expect some particular behavior 
 
 out of the receiving process.  Please tell us *what* that might be, and 
 
 we'll see what we can do to help out.
 
 
 
 Gary Herron
 
 
 
 
 
 
 
 -- 
 
 Dr. Gary Herron
 
 Department of Computer Science
 
 DigiPen Institute of Technology
 
 (425) 895-4418

I found Sendkeys works.

import subprocess
import time
import SendKeys

rsconfig = subprocess.Popen([C:\Program 
Files\Photometrics\PVCam64\utilities\RSConfig\RSConfig.exe, ])
time.sleep(2)
SendKeys.SendKeys('%D\n', with_newlines=True)

Basically there is a dialog with a Done button and 'Alt D' selects the Done 
button. The subprocess program runs some interface code which sets up an ini 
file that the rest of the program needs. But then I run into another problem 
with Windows permissions. The program needs to edit this ini file located in 
the C:\Windows directory. Windows won't let you without administrator 
permissions. So then I run into login issues, etc. I kind of gave up and this 
program has to be run outside my main program. It's annoying since it's just 
this stupid little text ini file, but I can't convince Windows it doesn't 
matter if gets edited because it's in a system directory.
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Re: Send alt key to subprocess.PIPE stdin

2013-09-11 Thread Dave Angel 
On 11/9/2013 10:26, Wanderer wrote:

 How do I send the command 'Alt+D' to subprocess.PIPE?

That's not a command, it's a keystroke combination.  And without knowing
what RSConfig.exe is looking to get its keystrokes, it might not even be
possible to feed it any keystrokes via the pipe.

if the program does indeed use stdin, there's no portable encoding for
Alt-D.  But if your program only runs on one particular platform, you
might be able to find docs for that platform that explain it.


 My code is

 import subprocess
 rsconfig = subprocess.Popen([C:\Program 
 Files\Photometrics\PVCam64\utilities\RSConfig\RSConfig.exe, 
 ],stdin=subprocess.PIPE)

That string will only work by accident.  You need to make it a raw
string, or use forward slashes, or double them.  As it happens, with
this PARTICULAR set of directories, you won't get into trouble with
Python 2.7.3



-- 
DaveA


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