[Tutor] independent process

[Thomi Richards]

ummm... i think you may be looking for the fork pid thingy what?? I'm
not sure if it is windows compat. though.. look under wither OS or
system modules... can't remember which right now...

On Wed, 23 Oct 2002 16:47:44 +0930 Thus said "BELSEY, Dylan"
<dylan.belsey@baesystems.com>:

> OK, I have just been shown a possible solution to this problem.
> 
> 	os.system("start %s" %(self.DB_GUI))
> 
> 	Using "start" will create an independent process in DOS/Windows
> systems.  However, is there a Python, platform independent way of
> doing this.  I am also open to any other solutions that people may
> have.
> 
> 		Dylan
> 
> 
> -----Original Message-----
> From: BELSEY, Dylan [mailto:dylan.belsey@baesystems.com]
> Sent: Wednesday, 23 October 2002 16:27
> To: 'tutor@python.org'
> Subject: [Tutor] independent process
> 
> 
> Hi Tutors,
> 	I need some advice on how to run an independent application from
> within Python.
> 	Here is the scenario.  I am using WinNT, with Python 2.1.1 and
> Tkinter (inc. Pmw) for my GUIs.  Currently I have created a GUI that
> has three buttons on it.  The first button initiates a system command
> to create a text file and a .dat file, from a binary file, by calling
> a prewritten C++ utility (in executable form).  The second button also
> runs a system command to load a database using the .dat file.  The
> command looks something like: 
> 
> 	"mysql < SignalRecording1.dat"
> 
> 	It is the third button that I am having trouble with.  I need
> 	this
> button, when pressed, to start up a front-end to the database, by
> calling the front-end's executable.  Currently I am using MySQL-Front.
> I have put the location of the .exe in an environment variable.  So I
> interrogate the variable using: 
> 
> 	self.DB_GUI = os.getenv("DB_GUI") 
> 
> and then run either: 
> 
> 	os.system("%s" %(self.DB_GUI)) 
> or 
> 	CommandEnv = os.popen3("%s" %(self.DB_GUI))
> 
> 	My problem is that with either of these commands, the GUI
> 	containing
> the buttons hangs until I close the MySQL-Front application.  Is there
> away to spawn this as a totally independent process/application so
> that the user can close the initial GUI or keep using it without
> having to quit the front-end?  Note: I am using Windows.
> 
> 	TIA,
> 		Dylan
> 
> 
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-- 
Lord, what fools these mortals be!
 -- midsummer nights dream.
Thomi Richards,
thomi@imail.net.nz