Python3实现队列

class MyQueue:
    
    def __init__(self):
        self.__arr = []


    def push(self, x: int) -> None:
        self.__arr.append(x)


    def pop(self) -> int:
        return self.__arr.pop(0)


    def peek(self) -> int:
        return self.__arr[0]


    def empty(self) -> bool:
        return len(self.__arr)==0