+ 2

I don't understand pop and push function here? Python

class Queue: def __init__(self, contents): self._hiddenlist = list(contents) def push(self, value): self._hiddenlist.insert(0, value) def pop(self): return self._hiddenlist.pop(-1) def __repr__(self): return "Queue({})".format(self._hiddenlist) queue = Queue([1, 2, 3]) print(queue) queue.push(0) print(queue) queue.pop() print(queue) print(queue._hiddenlist)

9th Jun 2020, 5:03 PM
3.14 - avatar
2 Answers
+ 10
push() and pop) are instance methods of a class Queue. push() inserts a new value at index 0 (left side) to the _hiddenlist, pop() removes the last value of the list. pop() and insert() are common list methods.
9th Jun 2020, 5:17 PM
Lothar - avatar
+ 3
Lothar said all, what is to say, but read his words carefully: Did u recognize that he mentioned the self defined method pop() AND the standard method pop()? we have two pop() functions here.
9th Jun 2020, 5:30 PM
Oma Falk
Oma Falk - avatar