linux - Python subprocess passes one argument only -

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I have a Python script (2.7) which I use to apply an external process. Recently it worked fine.

But now when I run it, I feel that it does not exceed the logic of the process. I have also debug the implementation process and it only receives the path of a logic (process executable). 

  p = subprocess.Popen ([". / Myapp", "-p", "s"], shell = true) p.communicate ()

The code passes only "myapp" as a command argument. Why can this happen?

when open = true , just a string (no list) pass Do; 

  p = subprocess.Popen ('./ myapp -ps', shell = true) p. As always  
     
  •   shell = wrong

update

( Default) to shell = true and pass an array of stars; And

  • A complete path to the executable, not a relative path.

    • Ie; 

      Subprocess. If you are interested only in the form of [[Proc: stdout, stderr = proc.communicate ()

    popen (code)> standout (And not stderr ), like the above solution (it is safe and small): 

      stdout = subprocess.check_output ['/ path / from / binaries ',' -P ',' S '])

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