Python转载版
https://github.com/faif/python-patterns/blob/master/behavioral/template.py
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#!/usr/bin/env python # -*- coding: utf-8 -*- """ http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/ An example of the Template pattern in Python *TL;DR80 Defines the skeleton of an algorithm, deferring steps to subclasses. """ ingredients = "spam eggs apple" line = '-' * 10 # Skeletons def iter_elements(getter, action): """Template skeleton that iterates items""" for element in getter(): action(element) print(line) def rev_elements(getter, action): """Template skeleton that iterates items in reverse order""" for element in getter()[::-1]: action(element) print(line) # Getters def get_list(): return ingredients.split() def get_lists(): return [list(x) for x in ingredients.split()] # Actions def print_item(item): print(item) def reverse_item(item): print(item[::-1]) # Makes templates def make_template(skeleton, getter, action): """Instantiate a template method with getter and action""" def template(): skeleton(getter, action) return template # Create our template functions templates = [make_template(s, g, a) for g in (get_list, get_lists) for a in (print_item, reverse_item) for s in (iter_elements, rev_elements)] # Execute them for template in templates: template() ### OUTPUT ### # spam # ---------- # eggs # ---------- # apple # ---------- # apple # ---------- # eggs # ---------- # spam # ---------- # maps # ---------- # sgge # ---------- # elppa # ---------- # elppa # ---------- # sgge # ---------- # maps # ---------- # ['s', 'p', 'a', 'm'] # ---------- # ['e', 'g', 'g', 's'] # ---------- # ['a', 'p', 'p', 'l', 'e'] # ---------- # ['a', 'p', 'p', 'l', 'e'] # ---------- # ['e', 'g', 'g', 's'] # ---------- # ['s', 'p', 'a', 'm'] # ---------- # ['m', 'a', 'p', 's'] # ---------- # ['s', 'g', 'g', 'e'] # ---------- # ['e', 'l', 'p', 'p', 'a'] # ---------- # ['e', 'l', 'p', 'p', 'a'] # ---------- # ['s', 'g', 'g', 'e'] # ---------- # ['m', 'a', 'p', 's'] # ----------