Python design patterns of the principles and usage of the interpreter pattern example analysis

#!/usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = 'Andy'
"""
big talk about design patterns
design pattern——interpreter mode
interpreter mode(Interpreter Pattern):Given a language，A representation of the grammar that defines it，and define an interpreter，This interpreter uses this representation to interpret sentences in the language.
"""
# Abstract an interpreter class
class AbstractExpression(object):
  def interpreter(self, context):
    pass
# Concrete Interpreter - Terminal Inherit Abstract Interpreter
class TerminalExpression(AbstractExpression):
  def interpreter(self, context):
    print "Terminal Interpreter",context
# Concrete Interpreter - Terminal Inherit Abstract Interpreter
class NotTerminalExpression(AbstractExpression):
  def interpreter(self, context):
    print "Non-terminal interpreter",context
class Context(object):
  def __init__(self):
     = ""
if __name__ == "__main__":
  context = Context()
   = 'Andy'
  arr_list = [NotTerminalExpression(),TerminalExpression(),TerminalExpression()]
  for entry in arr_list:
    (context)