python入门-函数（二）

1 函数传递参数

def greet_users(names):
    """向列表中的每个用户都发处问候"""
    for name in names:
        msg = "Hello ," + name.title() + "!"
        print(msg)


usernames = ['baker','xiaocui','xiaoding']
greet_users(usernames)

 

2 修改函数中的列表

unprinted_designs = ['iphone case' ,'robot pendant' , 'dodecahedron']
completed_models = []

while unprinted_designs:
    current_design = unprinted_designs.pop()

    print("Pringting model:" + current_design)
    completed_models.append(current_design)

print("\nThe following models have been printed:")
for completed_model in completed_models:
    print(completed_model)


print(completed_models[:])

 

3 传递任意数量的实参-元祖

def make_pizza(*toppings):
    """打印顾客点的配料"""
    print(toppings)

make_pizza('pepperoni')
make_pizza('mushrooms','green peppers','extra cheese')

 

4  使用任意数量的关键字-字典

def build_profile(first, last, **user_info):
    """创建一个字典，其中包含我们知道的有关用户的一切"""
    profile = {}
    profile['first_name'] = first
    profile['last_name'] = last
    for key,value in user_info.items():
        profile[key] = value
    return profile

user_profile = build_profile('albert','einstein',location='princeton',field='physics')

print(user_profile)

 

5 把函数储存在模块中

import pizza
pizza.make_pizza(16,'pepperonis')
pizza.make_pizza(12,'mushrooms','green peppers','extra cheese')

from pizza import make_pizza
make_pizza(17,'pepperonis')

from pizza import make_pizza as mp
mp(18,'pepperonis')

import pizza as p
make_pizza(19,'pepperonis')

from pizza import *
make_pizza(20,'pepperonis')

导入函数的各种用法