Python定时器线程池原理详解

from threading import Timer
import time
# 普通单次定时器
def handle():
print("普通单次定时器 函数被执行");
t1=Timer(interval=1,function=handle);
t1.start();

from threading import Timer
import time
# 循环定时器
def loop_handle():
print("循环定时器定时器 函数被执行");
global t2;
t2=Timer(interval=1,function=loop_handle);
t2.start();
 
t2=Timer(interval=1,function=loop_handle);
t2.start();
 
time.sleep(5);# 对主线程停止5s；
t2.cancel(); # t2 在主main 线程阻塞5s t2执行5s

from concurrent.futures import ThreadPoolExecutor # 导入线程池
import time
def printName(name):
print("名字",name);
time.sleep(2);
nameList=['Tom','jirl','steam'];
# 抢占式线程池
start2=time.time();
with ThreadPoolExecutor(3) as executor:
for i in nameList:# 因为每次执行的函数不一致，所以参数要分开传递
executor.submit(printName,i); 
end2=time.time();
print("2 speed:",str(end2-start2));
#非抢占式线程池