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
YW5pbWFscyA9IFsnQ2F0JywgJ0RvZycsICdFbGVwaGFudCddCmZvciBhbmltYWwgaW4gYW5pbWFsczoKICAgIHByaW50KGFuaW1hbCwgaWQoYW5pbWFsKSkKZm9yIGFuaW1hbCBpbiBhbmltYWxzOgogICAgaWYgbGVuKGFuaW1hbCkgPiAzOgogICAgICAgIGFuaW1hbCA9IGFuaW1hbFs6M10KICAgIHByaW50KGFuaW1hbCwgbGVuKGFuaW1hbCksIGlkKGFuaW1hbCkpCmZvciBhbmltYWwgaW4gYW5pbWFsczoKICAgIHByaW50KGFuaW1hbCwgbGVuKGFuaW1hbCksIGlkKGFuaW1hbCkpCgojaHR0cHM6Ly9wdC5zdGFja292ZXJmbG93LmNvbS9xLzM0NDc1NC8xMDE=