anchor.diff:  @set goodpython=0
   @IF !pythoninstance^:^~1^,-3! EQU 2.7 set goodpython=1
   @IF !pythoninstance^:^~1^,-3! GEQ 3.5 IF NOT EXIST %mesa%\mesa set goodpython=1
  -@IF !pythoninstance^:^~1^,-3! GEQ 3.5 IF EXIST %mesa%\mesa IF NOT EXIST %mesa%\mesa\subprojects\.gitignore set goodpython=0
  +@IF !pythoninstance^:^~1^,-3! GEQ 3.5 IF EXIST %mesa%\mesa IF EXIST %mesa%\mesa\subprojects\.gitignore set goodpython=1
   @IF !goodpython!==1 set /a pythoncount+=1
   @IF !pythoncount!==%pyselect% set selectedpython=%%a
   )
  
positive.code: @set goodpython=0
  @IF !pythoninstance^:^~1^,-3! EQU 2.7 set goodpython=1
  @IF !pythoninstance^:^~1^,-3! GEQ 3.5 IF NOT EXIST %mesa%\mesa set goodpython=1
  @IF !pythoninstance^:^~1^,-3! GEQ 3.5 IF EXIST %mesa%\mesa IF NOT EXIST %mesa%\mesa\subprojects\.gitignore set goodpython=0
  @IF !goodpython!==1 set /a pythontotal+=1
  )
  @IF %pythontotal%==0 echo WARNING: No suitable Python installation found by Python launcher. Note that Python 2.7 or Python 3.5 and newer is required.
  
negative.code: @set goodpython=0
  @IF !pythoninstance^:^~1^,-3! EQU 2.7 set goodpython=1
  @IF !pythoninstance^:^~1^,-3! GEQ 3.5 IF NOT EXIST %mesa%\mesa set goodpython=1
  @IF !pythoninstance^:^~1^,-3! GEQ 3.5 IF EXIST %mesa%\mesa IF EXIST %mesa%\mesa\subprojects\.gitignore set goodpython=1
  @IF !goodpython!==1 set /a pythoncount+=1
  @IF !goodpython!==1 echo !pythoncount!. Python !pythoninstance:~1,-3! !pythoninstance:~-2! bit
  )
  