Python Basic Learning-function-related

#!/usr/bin/env python #-*-coding:utf-8-*-function related

def f1 (par,par2,par3= "OK"): #定义函数 with parameter, with parameter default value with return value

Try

Print ("This was function by%s%d%s"% (par, PAR2,PAR3))

Except

Return False

Else

Return True

res = f1 ("WH") #调用函数 not to change default parameters

Print (RES)

Res2 = F1 ("WX", +, "pig") #改变默认参数

Print (Res2)

Res3 = F1 (par2=24,par= "MM", par3= "shit") #调用使用指定参数形式 can be not in the form parameter order

#------------------------------Dynamic Parameters-----------------

def f2 (*args): # * denotes any of the formal parameters

Print (args)

F2 ("WX", "WH", "QQ") #动态传人多个参数

Li = "Wanghao"

F2 (*li) #调用带 * Change each character of a string into an element of a tuple

F2 (LI) #如果不带 * The string is treated as an element in the tuple

def f3 (**args): # two * number parameter must be dictionary key value pair form K=v form

Print (Args,type (args))

F3 (k1=1,k2=2)

Dict1 = {"K1": 3, "K2": 4}

F3 (Kk=dict1) #把当前字典对象当作一个键值对中的Value

F3 (**dict1) #如果调用带两个 * Simply pass each key-value pair of the current dictionary as a parameter to the function

def f4 (*args,**kwargs): #万能参数

Print (args)

Print (Kwargs)

F4 (11,22,33,44,k1= "v1", k2= "v2", k3= "v3") #根据属性自动把参数带入 corresponding parameters 11,22,33,44 bring *args k1....k3 into **kwargs

#---------------------------------------Dynamic parameter End--------------

#函数中传递的参数是引用

#----------------------------Global Variables-----------------

#未定义到函数内部的变量是全局变量 #修改全局变量 Global name #如果全局变量是 list or dictionary, you can add a list element to a function but you cannot reassign a variable #定义全局变量全用大写

Gname= "Alex"

def f5 ():

Print (Gname)

Global Gname #需要修改全局变量 must declare

Gname = "ALEX.W"

def f6 ():

Print (Gname)

F5 ()

F6 ()

Python Basic Learning-function-related