Stack implementation

new_stack.py

# New Stack Implementation

import logging

class Stack:
    def __init__(self):
        self._items = []

    def push(self, item):
        self._items.append(item)

    def pop(self):
        try:
            return self._items.pop()
        except IndexError:
            msg = "Trying to pop data from an empty stack."
            logging.warning(msg)
            raise IndexError(msg)

    def __len__(self):
        return len(self._items)

    def __repr__(self):
        return f"{self.__class__.__name__}()"

    def __str__(self):
        return f"{self.__class__.__name__}({self._items})"

old_stack.py

# https://realpython.com/python-append/#implementing-a-stack

class Stack:
    def __init__(self):
        self._items = []

    def push(self, item):
        self._items.append(item)

    def pop(self):
        try:
            return self._items.pop()
        except IndexError:
            print("Empty stack")

    def __len__(self):
        return len(self._items)

    def __repr__(self):
        return f"Stack({self._items})"