import time
from multiprocessing import Process
from threading import Thread
from time import sleep


# 计算密集型
def count(x, y):
 c = 0
 while c < 7000000:
 c += 1
 x += 1
 y += 1


# IO密集函数
def io():
 write()
 read()


def write():
 f = open('test.txt', 'w')
 for i in range(1500000):
 f.write("hello world\n")
 f.close()


def read():
 f = open('test.txt')
 lines = f.readlines()
 f.close()