【Python】Learn Python the hard way, ex29 if语句

people = 20cats = 30dogs = 15if people < cats:    print "Too many cats! The world is doomed!"if people > cats:    print "Not many cats! The world is saved!"    if people < dogs:    print "The world is drooled on!"    if people > dogs:    print "The world is dry!"            dogs += 5if people >= dogs:    print "People are greater than or equal to dogs."    if people <= dogs:    print "People are less than or equal to dogs."    if people == dogs:    print "People are dogs."    """Test Result:Too many cats! The world is doomed!The world is dry!People are greater than or equal to dogs.People are less than or equal to dogs.People are dogs."""