anchor.diff:  
   set PYTHON_VERSION=2.7.6
   set PYTHON_MSI=python-%PYTHON_VERSION%.msi
  -set PYTHON_EXE=c:\\Python2.7\\python.exe
  -set PYTHON_PATH=C:\Python27;c:\Python27\Scripts
  +set PYTHON_EXE=c:\Python27\python.exe
  +set PYTHON_PATH=c:\Python27;c:\Python27\Scripts
   
   echo,
   echo ------------------------------------------------------------------
  
positive.code: 
  pip install virtualenv
  
  
  
negative.code: 
  if not exist %PYTHON_EXE% (
  if not exist %PYTHON_MSI% (
      curl -L -O http://python.org/ftp/python/%PYTHON_VERSION%/%PYTHON_MSI%
  )
  )
  
  