while is checks if they are actually the same object in memory. For mutable objects like lists, even if they look identical, they are stored in different memory locations, so a == b might be True, but a is b will be False. For immutable objects like integers...
In object-oriented and functional programming, an immutable object is an object whose state cannot be modified after it is created. This is in contrast to a mutable object (changeable object), which can be modified after it is created. Quoted from Wikipedia...
In the first panel'spie chart, "this image" refers to the entire comic image, the one that can be downloaded from xkcd (and the entire comic as displayed here above). This is a little confusing as it would be easy to misunderstand this meaning, and believe that the first panel only re...