Skip to content

Instantly share code, notes, and snippets.

@JackMorris JackMorris/stack.py Secret
Created Apr 12, 2014

Embed
What would you like to do?
class Stack:
def __init__(self):
# Empty stack represented with an empty list.
self.stack = []
def push(self, x):
# Append the item onto our list.
self.stack.append(x)
def pop(self):
# Pop the item off of our list.
return self.stack.pop()
def peek(self):
# As long as it isn't empty, return the last item in our list.
if len(self.stack) > 0:
return self.stack[-1] # Index -1 = last element.
else:
return None
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.