# 1、函数名可以被引用 def add(x, y): print(x + y) a = add a()
# 2、函数名可以当作参数传递 def add(x, y): print(x + y) def index(x, y, operation): operation(x, y) index(1, 2, add)
# 3、函数名可以当作返回值使用 def index(): print(‘hello index‘) def func(a): return a f = func(index) f()
1、控制台---简单菜单选项
def login(): print(‘Login in!‘) def register(): print(‘register‘) def shopping(): print(‘shopping‘) def pay(): print(‘pay‘) func_dict = { ‘1‘: login, ‘2‘: register, ‘3‘: shopping, ‘4‘: pay, } while True: print(""" 1、登录 2、注册 3、购物 4、结账 """, end=‘‘) choice = input(‘>>>‘).strip() if choice == ‘5‘: break if choice not in func_dict: continue func_dict[choice]()
2、基于字典索引的简单计算机
# 基于字典索引的简易计算器 def add(x, y): return x + y def multiply(x, y): return x * y def divide(x, y): return x / y my_dict = {‘+‘: add, ‘/‘: divide, ‘*‘: multiply} while True: raw_str = input(‘>>>‘) new_str = ‘‘ for char in raw_str: if char != ‘ ‘: new_str += char if new_str.find(‘/‘) != -1: operation_index = new_str.find(‘/‘) elif new_str.find(‘*‘) != -1: operation_index = new_str.find(‘*‘) elif new_str.find(‘+‘) != -1: operation_index = new_str.find(‘+‘) operation = new_str[operation_index] first_num = float(new_str[:operation_index]) second_num = float(new_str[operation_index + 1:]) result = 0 result = my_dict[operation](first_num, second_num) print(result)
原文：https://www.cnblogs.com/Ghostant/p/11834709.html
