I run a Java command line program. The point is, that it's not the program that output this error message for sure. And I don't expect popen3() to catch and report errors. I just want to keep my screen output clean, and I expect popen3() to run the program and not let anything slip to the screen, after all as I understood it is supposed to capture STDERR and STDOUT, but maybe I didn' t understand it right (it's quite probable). Anyway anyway I can do such a thing?
Thanks. Peter Hansen wrote: > Yoav wrote: > >> I use the following code to the console output: >> >> def get_console(cmd): >> try: >> p_in, p_out, p_err = os.popen3(cmd) >> except: >> pass >> out_str = '' >> for obj in p_out: >> out_str = out_str + obj >> for obj in p_err: >> out_str = out_str + obj >> return out_str >> >> >> for some reason some exceptions (stderr outputs) are not captured by >> the try method, and slip to the screen. Any one has any idea on how >> can prevent from any output that I don't want to? >> The output I get on these exceptions is: >> close failed: [Errno 0] No error > > > What makes you think the errors are getting past the try/except? Could > they be printed by the program you are invoking with popen3() instead? > What does "cmd" equal when you get this failure? > > Maybe you are expecting that popen3() will somehow raise exceptions when > the called program fails, exceptions which the except statement would > catch. That's not the case. > > -Peter -- http://mail.python.org/mailman/listinfo/python-list
