On 10:16 am, orsent...@gmail.com wrote: >Hello, > >My current application structure is like this: > >If something: > d = defertoThread(func1,params1) >if something2: > d = defertoThread(func2, params2) >... > > >d.addCallback(lambda r: transport.write(r) > >I had designed it this way because, the functions, func1, func2 etc.. >were all assumed to be Blocking ones. >One of them, internally uses subprocess.Popen() and executes the >command and returns the output. All is fine till now. > >But I had situation, where for the process which is executed via >subprocess module, I had to attach a pseudo-terminal. >subprocess does not have a mechanism to send a pseudo-terminal to the >process. > >So, I looked into utils.getProcessOutput and found that it does have a >mechanism to send a psuedo-terminal to the process. >But the problem I am facing is, if I replace the subprocess Call in >one of those functions (which are called via deferToThread ), I might >need to return the value (in a blocking way) so that it fits in rest >of the program well. > > >So, my question is, how can I make utils.getProcessOutput return value >instead of a differed. I am okay if it blocks.
It's "Deferred" not "differed". You cannot make getProcessOutput return anything but a Deferred. Also, you cannot call getProcessOutput from a thread. If you're removing the code that blocks, then you should be able to stop using deferToThread. Then you just have to call getProcessOutput to get your `d` above (or another function that calls it and perhaps adds a callback or two). Jean-Paul _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
