numList = [2000, 2003, 2005, 2006] stringList = ["Essential", "Python", "Code"] mixedList = [1, 2, "three", 4] subList = ["A", "B", ["C", 2006]] listList = [numList, stringList, mixedList, subList]
for x in listList: for y in x: if isinstance(y, int): print y + 1 if isinstance(y, basestring): print "String:" + y
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