SikuliX

onAppear(): TypeError 'NoneType' object is not callable when use observe() --- second parameter must be the name of a handler function

Asked by lynn

def MyPrint(MyString):
    print "Now system is in:", MyString

reg1=Region(Screen(1))
reg1.onAppear("GeneralSettings-1.png",MyPrint("In General"))
reg1.observe(50,False)

system display [error] TypeError ( 'NoneType' object is not callable ) after running.

And if I change as reg1.observe(50,True), no such error but script seems not working correctly, MyPrint is execute even no "GeneralSettings-1.png" display

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RaiMan (raimund-hocke) said : 		#1

see https://answers.launchpad.net/sikuli/+question/261418

the
MyPrint("In General")

is executed at the time, the interpreter sees the line with onAppear() and turns this 2nd parameter into None (the return of MyPrint()).

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