python assign values to list elements in loop

Question

Is this a valid python behavior? I would think that the end result should be [0,0,0] and the id() function should return identical values each iteration. How to make it pyth

Answer 1

you actually didnt change the list at all. the first thing for loop did was to assign bar[0] to foo(equivalent to foo = bar[0]). foo is just an reference to 1. Then you assign another onject 0 to foo. This changed the reference of foo to 0. But you didnt change bar[0]. Remember, foo as a variable, references bar[0], but assign another value/object to foo doesn't affect bar[0] at all.