Algorithms and data structures created by dimejimudele - https://repl.it/@dimejimudele/Algorithms-and-data-structures

stacks.py

# Implementiog stacks data structure
class stack:
  def __init__(self):
    self.items = []

  def isEmpty(self):
    return self.items == []

  def push(self, item):
    return self.items.append(item)
  
  def peek(self):
    return self.items[-1]

  def size(self):
    return len(self.items)


s = stack()
s.push(7)
s.push(8)
s.push(9)
s.push(10)
print(s.peek())

print(s.size())
print(s.isEmpty())