- animals = ['Cat', 'Dog', 'Elephant'] 
- for animal in animals: 
-     print(animal, id(animal)) 
- for animal in animals: 
-     if len(animal) > 3: 
-         animal = animal[:3] 
-     print(animal, len(animal), id(animal)) 
- for animal in animals: 
-     print(animal, len(animal), id(animal)) 
-   
- #https://pt.stackoverflow.com/q/344754/101 
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