Should I use threads here?

[Martin Franklin]

Era Akost wrote:

>> This may be true. But the readline() solution *can't* be any worse, and
>> might be better. Readlines() will definitely not return until the called
>> program closes its standard output. Of course, if Era has no access to
>> the program's source he has no possibility of adjusting its output
>> behavior.
>> 
>> regards
>>  Steve
> 
> Hi all,
> 
> Steve, I tried your suggestion, but that didn't change the situation.
> Let me explain it again. I have a simple GUI with a button
> and a text widget. When I click the button, the following fuction is
> called:
> 
> def execute(self, command):
> #command is a string containing the .exe program and its file arguments
>     i, o = os.popen2(command)
>     while 1:
>         line = o.readline()
>         if not line:
>             break
>         self.text.insert(END, line)
>     i.close(), o.close()
> 
> Now, the button on the GUI remaines clicked for a while (it seems to me
> all the time that the .exe program is running). And only after that, its
> output is displayed in the text widget.
> 
> But this is not the way the .exe program behaves when it runs on
> its own. During the execution it keeps displaying the results on the
> console. And this is exactly the behaviour that I'd like for my GUI.
> Thus, I asked if threads can do something in this case. Only that I
> don't yet understand how threads work, and so on - therefore I need some
> help.
> 
> Again, many thanks
> Era
> 


Era,

Try calling self.text.update() in the loop.

Martin.