leetcode225.py
def empty(self):
        """
        Returns whether the stack is empty.
        :rtype: bool
        """

        Returns whether the stack is empty.
        :rtype: bool
        
Returns whether the stack is empty.
Returns whether the stack is empty .
def empty(self):
def empty ( self ) :
Returns whether the stack is empty.
Returns whether the stack is empty .
"""
        Returns whether the stack is empty.
        :rtype: bool
        """
None
bool
self