title: I want to take screenshot of a specific region on webpage using pyscreenshot
body: <p>I have used pyscreenshot package and I am getting below error while running my script. I am trying to take screen shot of specific region.
  below is my script:</p>
  
  <pre><code>import pyscreenshot as ImageGrab
  
  im=ImageGrab.grab(bbox=(10,10,500,500))
  
  im.save('im.png')
  
  if __name__ == '__main__':
      pass
  </code></pre>
  
  <p>================================================================================
    Traceback (most recent call last):
        File "", line 1, in 
        File "C:\Python27\lib\multiprocessing\forking.py", line 380, in main
          prepare(preparation_data)
        File "C:\Python27\lib\multiprocessing\forking.py", line 509, in prepare
          '<strong>parents_main</strong>', file, path_name, etc
        File "C:\harsh\CodeForAutomation\latest_25jan2019\aha-gui-fvt\pytesseract\pytes\test_pyscreenshot_localised.py", line 9, in 
          im=ImageGrab.grab(bbox=(10,10,500,500))
        File "build\bdist.win32\egg\pyscreenshot__init__.py", line 67, in grab</p>
  
  <pre><code>  File "build\bdist.win32\egg\pyscreenshot\__init__.py", line 46, in _grab
  
    File "build\bdist.win32\egg\pyscreenshot\procutil.py", line 31, in run_in_childprocess
    File "C:\Python27\lib\multiprocessing\process.py", line 130, in start
      self._popen = Popen(self)
    File "C:\Python27\lib\multiprocessing\forking.py", line 258, in __init__
      cmd = get_command_line() + [rhandle]
    File "C:\Python27\lib\multiprocessing\forking.py", line 358, in get_command_line
      is not going to be frozen to produce a Windows executable.''')
  RuntimeError: 
              Attempt to start a new process before the current process
              has finished its bootstrapping phase.
  
              This probably means that you are on Windows and you have
              forgotten to use the proper idiom in the main module:
  
                  if __name__ == '__main__':
                      freeze_support()
                      ...
  
              The "freeze_support()" line can be omitted if the program
              is not going to be frozen to produce a Windows executable.
  </code></pre>