20180720 (Lambda anonymous function, sorded () sort function, filter () filtering function, map () mapping function, recursive, dichotomy function)

I. Lambda anonymous function (one line for a function, but not a complex function operation)

Syntax: function name = lambda parameter: return value

Attention:

1. Functions can have more than one argument, separated by commas

2. Anonymous functions no matter how complex, can only write one line, and the logic is finished directly return data

3. The return value, like a normal function, can be any data type

For example: normal function

def func (N)

Return N*n

Print (func (6)) ======>36

For example: Lambda

a = lambda x:x*x (Lambda is an anonymous function, and the x parameter is followed by the function body (return content))

　print (a) =====>36

Two. Sorted sorting function

20180720 (Lambda anonymous function, sorded () sort function, filter () filtering function, map () mapping function, recursive, dichotomy function)