anchor.diff:  if not exist %PYTHON_EXE% (
   if exist %PYTHON_MSI% (
       msiexec.exe /qb /i %PYTHON_MSI% ALLUSERS=1 ADDLOCAL=ALL
  +) else (
  +    echo Python installer package didn't seem to download correctly.
  +    exit /b 1
   )
   )
   
  
positive.code: echo ------------------------------------------------------------------
  echo,
  
  rem reg add "HKCU\Environment" /v PATH /t REG_EXPAND_SZ /d "%PYTHON_PATH%"
  rem reg add "HKLM\SYSTEM\ControlSet001\Control\Session Manager\Environment" /v PATH /t REG_EXPAND_SZ /d "%PATH%;c:\Python27;c:\Python27\Scripts"
  reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /v PATH /t REG_EXPAND_SZ /d "%PATH%;%PYTHON_PATH%"
  
  rem Temporarily set the path.
  set PATH=%PATH%;%PYTHON_PATH%
  
  echo,
  
negative.code: 
  if not exist %PYTHON_EXE% (
  if not exist %PYTHON_MSI% (
      curl -L -O http://python.org/ftp/python/%PYTHON_VERSION%/%PYTHON_MSI%
  )
  )
  
  