title: How to install subprocess module for python?
body: <p>pip is not able to find this module, as well as me on pypi website.
  Could you please tell me the secret, how to install it?</p>
  
  <p>I need the module to spawn new shell process via subprocess.call. I have seen a lot of examples, where people use <code>import subprocess</code>, but no one shows how it was installed.</p>
  
  <p>Error, that i got (just in case i've lost my mind and does not understand what is going on):</p>
  
  <pre><code>Microsoft Windows [Version 6.3.9600]
  (c) 2013 Microsoft Corporation. All rights reserved.
  
  C:\Users\Alexander\Desktop\tests-runner&gt;python run.py
  Traceback (most recent call last):
    File "run.py", line 165, in &lt;module&gt;
      main()
    File "run.py", line 27, in main
      subprocess.call('py.test')
    File "C:\Python27\lib\subprocess.py", line 522, in call
      return Popen(*popenargs, **kwargs).wait()
    File "C:\Python27\lib\subprocess.py", line 710, in __init__
      errread, errwrite)
    File "C:\Python27\lib\subprocess.py", line 958, in _execute_child
      startupinfo)
  WindowsError: [Error 2] The system cannot find the file specified
  </code></pre>