What are “pop, insert, append, remove, etc " commands called? Are they inbuilt functions? And why are they not highlighted in green, unlike keywords?
Push, Pop, Append, Extend, etc. these are the in-built functions that are applicable to list, tuples type of data structures. They are not highlighted like green words because there is a difference between keywords and function names. Keywords are a set of reserved words that can't be used while naming a variable or a function. Function names on the same can't have reserved names like in, or etc.