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1. 定义函数 def greet_user():
"""显示简单的问好"""
print("hello")
greet_user()
2. 参数传递 #以位置顺序来确定实参和形参的对应关系
def greet_user(name,age):
"""显示简单的问好"""
print("hello! "+ name)
print("your age is "+ age)
greet_user("yanglujian","27")
#关键字来确定参数传递的关系
def greet_user(name,age):
"""显示简单的问好"""
print("hello! "+ name)
print("your age is "+ age)
greet_user(name="yanglujian",age="27")
#参数默认值
def greet_user(name,age="25"):
"""显示简单的问好"""
print("hello! "+ name)
print("your age is "+ age)
greet_user(name="yanglujian",age="27")
greet_user(name="wanglinbin")
#有返回的函数
def greet_user(name,age="25"):
"""显示简单的问好"""
print("hello! "+ name)
print("your age is "+ age)
return "hello "+ name + " age:"+ age
greet_user(name="yanglujian",age="27")
print(greet_user(name="wanglinbin"))
#数据结构作为参数传递,值传递
users = ['yanglujian','wanglinbin','taojinchen']
users2 = users[:]
def greet_users(usrs):
for usr in usrs:
print("hello "+ usr)
usrs[0] = "new element"
greet_users(users[:]) # 将队列复制一份在将副本的引用传入函数
print(users)
print(users2)
#数据结构作为参数传递,引用传递
users = ['yanglujian','wanglinbin','taojinchen']
def greet_users(usrs):
for usr in usrs:
print("hello "+ usr)
users[0] = "new element"
greet_users(users)
print(users)
# 将任意长度参数传入
def greet_user(*names):
"""显示简单的问好"""
for name in names:
print("hello "+ name)
greet_user("yanglujian","wanglinbin",'taojincheng')
3. 模块化 #导入另外模块的函数，并且将导入的函数在该模块中重命名
from greet import greet_user as hello
hello("yanglujian","wanglinbin","taojincheng")
#导入另外模块，并且将该模块重命名
import greet as hello
hello.greet_user("yanglujian","wanglinbin","taojincheng")
hello.greet_anmail("杨","鉴定","你好吗")
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