code bring out error

Question

class Queue:

def __init__(self, contents):
self._hiddenlist = list(contents)

def push(self,value):
self._hiddenlist.insert(0, value)

def pop(self):
return self._hiddenlist.pop(-1)

def __repr__(self):
return "Queue({ })".format(self.hiddenlist)

queue = Queue([1, 2, 3,])
print(queue)
queue.push(0)
print(queue)
queue.pop()
print(queue)
print(queue._hiddenlist)

Answer 1

you're missing an underscore in your attribute call inside the __repr__ overload.

what are you trying to do with the __repr__ overload?

Answer 2

remove the space in {} and use format(self._hiddenlist)