human
I am working on the file "Python/Chapter-05/Calculator.ipynb".
The first task is:
The class Calculator supports three member variables:
  - the token stack mTokenStack 
  - the operator stack mOperators
  - the argument stack mArguments
The constructor takes a string that is tokenized and pushes the tokens onto the token stack such that the first token is on top of the token stack.
Can you write Python code for it?
 ... What is a the Python code you requested?
assistant
#Here is the Python code you requested.

class Calculator:
    def __init__(self, s):
        self.mTokens    = createStack(tokenize(s))
        self.mOperators = Stack()
        self.mArguments = Stack()