Python_Programs/stack.py at main · MayankVerma105/Python_Programs · GitHub

33 lines (26 loc) · 758 Bytes

class Stack:

def __init__(self):

self.values = list()

def push(self, element):

self.values.append(element)

def isEmpty(self):

return len(self.values) == 0

def pop(self):

if not (self.isEmpty()):

return self.values.pop()

else:

print('Stack Underflow')

return None

def top(self):

if not (self.isEmpty()):

return self.values[-1]

else:

print('Stack Empty')

return None

def size(self):

return len(self.values)

def __str__(self):

stringRepr = ''

for i in reversed(self.values):

stringRepr += str(i) + '\t'

return stringRepr

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