Exception Handling(Asserts):

Exception Handling:

find operations (explicit and implicit) when not successful raise an Exception FindFailed, that

will stop the script immediately.

For more sophisticated concepts, you can implement your own exception handling using the standard Python construct try: ... except: ... .

AssertionError:

 When it encounters an assert statement, Python evaluates the accompanying expression, which is hopefully true. If the expression is false, Python raises an AssertionError exception.

Sample Code:
import sys, os

def TestOne():
    App.focus("fieldworks")
    find("1477810460138.png").highlight(2)
    find(Pattern("1477810513968.png").targetOffset(28,0)).right(250).click()
    type("Testing")
    wait(2)
    assert exists("Testing.png")
    
try:
    TestOne()
except (AssertionError, FindFailed) as e:
    #print str(sys.exc_info())

    print "Print Error stack lines... " + str(e)