从列表中获取元素，并使用python将其放入堆栈中

Question

This is what i currently have and says that it is missing one argument when it tries to push i

this is the class that I have for this code

class ArrayStack:

def __init__(self):
    self._data = []

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

def is_empty(self):
    return len(self._data) == 0

def push(self, a):
    self._data.append(a)

def top(self):
    if self.is_empty():
        raise Empty('Stack is empty')    
    return self._data[-1]

def pop(self):
    if self.is_empty():
        raise Empty('Stack is empty')
    return self._data.pop()

def reverselist():
    expression = input("Enter whatever: ")
    stacks = ArrayStack
    listofstuff = []
    for item in expression:
        listofstuff.append(item)
        print(listofstuff)
    for token in listofstuff:
        i = str(token)
        stacks.push(i)

Answer 1

You need an instance of ArrayStack , not the class itself, change for ArrayStack() , this calls the constructor of your class.

def reverselist():
    expression = input("Enter whatever: ")
    stacks = ArrayStack()
    listofstuff = []
    for item in expression:
        listofstuff.append(item)
        print(listofstuff)
    for token in listofstuff:
        i = str(token)
        stacks.push(i)