3 way image comparison fails

My scripts compares the values of A, B and C and by this comparison launched a function specific to the DPI detected.

The problems are, aside from the multiple indent errors, that Sikuli can click on buttons when at 120 or 144 DPI. Is there a DPI limitation to Sikuli?

Also, am I making mu comparisons correctly

Lastly where can I shaare my compilation of novice questions and answers for the Sikuli user. I coverthe pain of selecting a useful Puthon IDE, creation of a robust image bank (unless you ha a DPI obsessed boss then all I can offer is meditation)creating a Sikuli based test harness. an localization testing the easy way via recognizing language agnostic objects to key upon.

# Logon with 96, 120 and 144 dpi
# define each logon as a function
def dpiLogin96():
   doubleClick(96 dpi image works )
   wait(10)
   type( , "<email address hidden>")
   wait(2)
   type( , "skyroom200")
   wait(3)
   click( )
   wait(10)
  # if exists( ,0): fails unknown reason
      #wait(1)
   click( )
popup("96 DPI Login Complete")
# end function
def dpiLogin120():
   doubleClick(120 dpi image )#manual click works sikuli fails
   wait(10)
   type( , "<email address hidden>")
   wait(2)
   type( , "skyroom200")
   wait(2)
   click( )
   wait(10)
   #if exists( ,0):
     # wait(1)
   click( )
popup("120 DPI Login Complete")
# end function
def dpiLogin144():
   doubleClick( 144dpiimage) # fails unknown reason, manual click functions
   wait(10)
   type( , "<email address hidden>")
   wait(2)
   type( , "skyroom200")
   wait(3)
   click( )
   wait(10)
   if exists( ,0):
     wait(1)
   click( )

#popup("144 DPI Login Complete")
# end function
# detects the dpi level

if exists( ):#96 dpi detection
      ret = dpiLogin96()
else:
  # if exists( ):# 120 dpi detection
  doubleclick( ) # another method to get DPI
  if exists( )
      ret = dpiLogin120()
        else:
           if exists( ): #144 dpi detection
               ret = dpiLogin144()