ModuleNotFoundError: No module named 'pygame'

i have written the code in python idle ..but while run the code this above error is showing

but while installimg the pygame i have already import the pygame module

Traceback (most recent call last):

File "F:/game guvi/snake.py", line 1, in <module>

import pygame,sys,os

ModuleNotFoundError: No module named 'pygame'