Functions of anonymous functions

The use of anonymous functions  

def func1(a,f):
    print('+++++>',a)
    r=f(a)
    print('=====>',r)
func1(8,lambda x:x**2)

Usage of anonymous functions ：

• Anonymous functions as parameters

Higher order function of system

stay Python in , Functions are also data types .

The data type corresponding to the function is function, It can be regarded as a complex data type .

Since it is also a data type , We can treat it as a number or a string .

Since variables can point to functions , The parameters of the function can receive variables , Then one function can take another function as an argument , Again , We can also treat one function as the return value of another function . The use of this function is called higher-order function .

 Higher order function ：
 The argument to one function is another function , Higher order function 
 Higher order function of system