Sikuli Doc - Example code returns error

Found anther topic and with a bit of modification this seems to work:

region = Region(12,152,1014,477)
print "scanning specified region"
r = region
r.onChange(1, changed)
r.observe(background=True)
Settings.isChanged = False
r.observe(3) #observes for 5 seconds
if Settings.isChanged:
    print "there were changes detected"
else:
    print "No changes detected"
def changed(event):
    for ch in event.changes:
        ch.highlight() # highlight all changes

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So in 3 seconds, it finds and highlights the changes, the problem is I would like to simply click on the location of ONE of the random changes

If i set it to:

def changed(event):
    for ch in event.changes:
        ch.click() #Click on the changes

it'll click on every single area that changed, I would like sikuli to only click the first change that it saw or just one of the random change.

I hope that makes sense
Thanks

def changed(event):
    for ch in event.changes:
        ch.click() #Click on the changes
        break

this will end the loop after the first click

... or you might try:
click(event.changes[0])

I've tried both. Still seems to click all of the changed locations:

here's the log for both suggestion above:

scanning specified region
[log] CLICK on L(648,365)@S(0)[0,0 1366x768] (25 msec)
[log] CLICK on L(628,479)@S(0)[0,0 1366x768] (46 msec)
[log] CLICK on L(628,479)@S(0)[0,0 1366x768] (51 msec)
[log] CLICK on L(628,480)@S(0)[0,0 1366x768] (45 msec)

not sure, what happened on your side.

this works as expected:

def changed(event):
  print "something changed ", len(event.changes)
  event.stopObserver()
  for chg in event.changes:
    chg.highlight()
  wait(2)
  for chg in event.changes:
    chg.highlight()
  print "click first"
  for chg in event.changes:
    chg.click()
    break
  print "click last"
  event.changes[-1].click()

img = "img.png"
m = find(img).grow(0, 150, 0, 0).below(200)
m.highlight(1)
m.onChange(10, changed)
m.observe(10)

I am taking care that 2 changes are detected - the print

[debug] Observer: changes: 2 in: R[46,121 258x200]@S(0)
[debug] Observer: running call back
something changed 2
[debug] Region: observe: request to stop observer for R[46,121 258x200]@S(0)
[debug] highlight M[102,153 14x8]On(0) S 10000 for 0.0 secs
[debug] highlight M[46,121 257x199]On(0) S 10000 for 0.0 secs
click first
[debug] CLICK on L[109,157]@S(0) (529 msec)
click last
[debug] CLICK on L[174,220]@S(0) (531 msec)
[debug] Observer: update result: Changes: true
[debug] Region: observe: ended successfully: R[46,121 258x200]@S(0)

Thanks RaiMan, that solved my question.

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