Could someone please help me complete the #TODO part? Please only help with implementing four (peek, reverse_top_two, remove_all, remove_all_but_one) functions in Part 1. 78798081828384858687888990919293949596979899100101102103104105106107108109110111112113>>> stack.is_empty()True# TODO: Implement this function.def remove_all(queue: Queue) -> None:"""Remove all items from the given queue.>>> queue = Queue ()>>> queue.enqueue (1)>>> queue.enqueue (2)>>> queue.enqueue (3)>>> remove_all(queue)>>> queue.is_empty()True# TODO: Implement this function.def remove_all_but_one(queue: Queue) -> None:"""Remove all items from the given queue except the last one.Precondition: contains at least one item.| | | | or: not queue.is_empty()>>> queue = Queue ()>>> queue.enqueue (1)>>> queue.enqueue (2)>>> queue.enqueue (3)>>>>>> queue.is_empty()Falseremove_all_but_one(queue)>>> queue.dequeue ()3>>> queue.is_empty() prep4.py Xprep4-starter_tests.pyC: > Users > PC > Desktop > prep4.py67891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677=== Module Description ===This module contains four functions for you to implement, where eachoperates on either a stack or a queue.We've provided deliberately confusing implementations of these ADTS inadts.py. This is because we don't want you to care at all about theimplementations of these classes, but instead ONLY use the public methods.defined in by the Stack or Queue ADTS. These are the following:Stack- push()pop()Queue##is_empty()-is_empty()- enqueue ()dequeue ()In particular, this means that you shouldn't try to access any attributesof either class, since the ADT descriptions only define what *operations*(methods) can be used for the ADTS.GENERAL HINT: save values in local variables! Even if you pop an item off ofa stack, it's not "gone forever" if you assign it to a variable.# Part 1from typing import Any, Optionalfrom adts import Stack, Queue# In this part of the prep, you will various Stack and Queue functions.## You must NOT access any attributes of the Stack/Queues passed into each# function.## You may ONLY use the is_empty(), push(), and pop() methods of Stack, and# the is_empty(), enqueue(), and dequeue () methods of Queue.def peek (stack: Stack) -> Optional [Any]:"""Return the top item on the given stack.If the stack is empty, return None.Unlike stack.pop, this function should leave the stack unchanged when thefunction ends. You can (and should) still call pop and push, just makesure that if you take any items off the stack, you put them back on!>>> stack = Stack()>>> stack.push(1)>>> stack.push (2)>>> peek(stack)2>>> stack.pop()2# TODO: Implement this function.def reverse_top_two(stack: Stack) -> None:"""Reverse the top two elements on .Precondition: has at least two items.>>> stack = Stack()>>> stack.push (1)>>> stack.push (2)>>> reverse_top_two(stack)>>> stack.pop()1>>> stack.pop()2

In Python, we can implement python stacks by the use the built-in List data structure. Python's…

Answered: Could someone please help me complete…

Could someone please help me complete the #TODO part? Please only help with implementing four (peek, reverse_top_two, remove_all, remove_all_but_one) functions in Part 1.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Regex, APIs, BeautifulSoup: python import requests, refrom pprint import pprintfrom bs4 import BeautifulSoup complete the missing bodies of the functions below: def mathmatic(target):"""Question 1You are doing fun math problems. Given a string of combination of '{}', '[]','()', you are required to return the substring included by the outermost '{}'.You need to write your code in one line.Args:target (str): the string to search inReturns:str>>> mathmatic('{[[[[]()]]]}')'[[[[]()]]]'>>> mathmatic('[(){([{}])}]')'([{}])'"""pass test code: # print(mathmatic('{[[[[]()]]]}'))# print(mathmatic('[(){([{}])}]'))
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