python ---- higher-order function filter ()

A description
　　filter ()  function is used to filter sequences, filtered ineligible element returns a list of qualified new elements. The receiving two parameters, as a function of a first, a second sequence, each element of the sequence
as an argument to a function arbitrates, then return True or False, and finally returns True new elements into the list.

Second, the syntax
　　is the syntax filter () method:

filter(function, iterable)

　　Parameters: determination function is a function ----
　　　　　---- is iterables iterable
　　Return Value:
　　　　　　finally returns a list of

Third, examples

DEF the even (NUM):
     IF NUM% 2 == 0:
         return True
     the else :
         return False 
LIS = [1,2,3,4,5,6 ] 
RES = filter (the even, LIS)
 Print (List (RES)) # filter retaining only return true data

Output:

[2, 4, 6]

 2. Filter all odd list:

def is_odd(n):
    return n % 2 == 1

newlist = filter(is_odd, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
print(list(newlist))

Output:

[1, 3, 5, 7, 9]

3. 1 ~ 100 filtered square root of the number is an integer of:

import math
def is_sqr(x):
    return math.sqrt(x) % 1 == 0

newlist = filter(is_sqr, range(1, 101))
print(list(newlist))

Output:

[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]