Python Ids

>>> fruit = 'apple'
>>> fruit is 'apple'
True
>>> fruit == 'apple'
True

>> id(fruit), id('apple')
(140031285906720, 140031285906720)

>>> id(fruit), id('orange')
(140031285906720, 140031285906912)

# why? How python infers that id of fruit is the same of 'apple', if a object has same value, would be same id?

Python variables work more like labels than boxes. So it acknowledges that 'apple' already exists and gets its id (source by @ramalho).

Tradução: http://pythonclub.com.br/tuplas-mutantes-em-python.html