Ytukyg

I want to make a code that can match parenthesis.
Assumptions are that parenthesis is given by string, and the input is given by list.

So below is my code:
I got the error that:

'AttributeError: 'list' object has no attribute 'parenthesis''

Please let me know what's wrong with my code.

def push(item):  

    stack.append(item)





def peek():  

    if len(stack) != 0:

        return stack[-1]



def pop():  #delete step

    if len(stack) != 0:

        item = stack.pop(-1)

        return item



def check(item):

    global stack1

    stack1 =

    global stack2

    stack2 =

    if item == '{':

        stack1.push('1')

    elif item == '}':

        stack1.pop()

    elif item == '(':

        stack2.push('2')

    elif item == ')':

        stack2.pop()



def parenthesis(self):

    for i in len(self):

        tail = self.peek

        tail.check

        self.pop()

    if len(stack1) == 0 & len(stack2) ==0 :

        print('pass')

    else:

        print('fail')



stack = 

push('{')

push('}')

stack.parenthesis()