学习计划
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1,学习目标
1:学会相关python测试框架
2:学会web自动化以及UI自动化相关知识
2,学习内容
1:python多线程处理,pip依赖管理与虚拟环境, python unittest测试框架, python unittest测试框架, 参数化用例,数据驱动, 测试报告美化与定制
2:python pytest测试实战
3,学习时间
提示:可以添加计划学习的时间
例如: 周一至周五晚上8点—晚上9点
周六上午 9 点-上午 11 点
周日下午 3 点-下午 6 点
4,学习产出
每次学习记录一篇博客
学习日记
什么是进程
1:进行是执行中的程序,拥有独立地址空间,内存,数据栈等,操作系统管理,派生新进程,进程间通信(IPC)方式共享信息,同线程下执行,并且共享相同的上下文,线程间的信息共享和同学更加简单,多线程并发执行,需要同步原语
python和线程
解释器主循环,主循环中只有一个控制线程在执行,使用的是全局解释器锁(GIL)
GIL如何保证一个线程
设置GIL,切换金一个线程去运行,
执行以下操作:指定数量的字节码执行,线程主动让出控制权,
爆显存设置会睡眠状态,解说GIL。重复上述步骤
两种线程管理:
_thread :提供了基本的线程和锁
threading:提供了更高级别,功能更全的线程管理,支持同步机制,支持守护线程
代码实操:
import logging
from time import sleep, ctime
logging.basicConfig(level=logging.INFO)
def loop0():
logging.info("start loop at" + ctime())
sleep(4)
logging.info("end loop at" + ctime())
def loop1():
logging.info("start loop at" + ctime())
sleep(2)
logging.info("end loop at" + ctime())
def main():
logging.info("start loop at" + ctime())
loop0()
loop1()
logging.info("end loop at" + ctime())
if __name__ == '__main':
main()
代码优化1:
import logging
from time import sleep, ctime
logging.basicConfig(level=logging.INFO)
def loop0():
logging.info("start loop at" + ctime())
sleep(4)
logging.info("end loop at" + ctime())
def loop1():
logging.info("start loop at" + ctime())
sleep(2)
logging.info("end loop at" + ctime())
def main():
logging.info("start loop at" + ctime())
_thread.start_new_thread(loop0,())
_thread.start_new_thread(loop1,())
sleep(6)#为了线程可以更好的运行
logging.info("end loop at" + ctime())
if __name__ == '__main':
main()
代码优化2:
import logging
from time import sleep, ctime
logging.basicConfig(level=logging.INFO)
loop=[2, 4]
def loop(nloop, nesc, lock):#新增线程锁:lock
logging.info("start loop" + shr(nloop) + " at" + ctime())
sleep(nesc)
logging.info("end loop" + shr(nloop) + " at" + ctime())
lock.release()
def main():
logging.info("start loop at" + ctime())
lock = []
nloops = range(len(loops))
for i in nloops:
lock = _thread.allocate_lock()
lock.acquire
lock.append(lock)
for i in nloops:#将线程打开
_thread.start_new_thread (loop, (i, loop[i], lock[1]))
for i in nloops:#判断线程是否关闭
while locks[i].locked:pass
logging.info("end loop at" + ctime())
if __name__ == '__main':
main()
替代代码锁的方法
import thread
import logging
import threading
from time import sleep, ctime
logging.basicConfig(level=logging.INFO)
loop=[2, 4]
def loop(nloop, nesc):#新增线程锁:lock
logging.info("start loop" + shr(nloop) + " at" + ctime())
sleep(nesc)
logging.info("end loop" + shr(nloop) + " at" + ctime())
def main():
logging.info("start loop at" + ctime())
thread = []
nloops = range(len(loops))
for i in nloops:#将线程打开
t = threading.thread (target=loop, args=(i, loop[i]))
thread.append(t)
for i in nloops
threads[i].start()
for i in nloops:#判断线程如果允许的话 就join到这里
threads[i].join()
logging.info("end loop at" + ctime())
if __name__ == '__main':
main()
import thread
import logging
import threading
from time import sleep, ctime
logging.basicConfig(level=logging.INFO)
loop=[2, 4]
class MyThread(threading.Thread)#MyThread方法的构造
def__init__(self, func, args, name='')
threading.Thread.__init__(self)
self.func = func
self.args = args
self.name = name
def run(self):
self.func(*self.args)
def loop(nloop, nesc):#新增线程锁:lock
logging.info("start loop" + shr(nloop) + " at" + ctime())
sleep(nesc)
logging.info("end loop" + shr(nloop) + " at" + ctime())
def main():
logging.info("start loop at" + ctime())
thread = []
nloops = range(len(loops))
for i in nloops:#将线程打开
t = threading.thread (target=loop, (i, loop[i], loop.__name__))
thread.append(t)
for i in nloops
threads[i].start()
for i in nloops:#判断线程如果允许的话 就join到这里
threads[i].join()
logging.info("end loop at" + ctime())
if __name__ == '__main':
main()
原语,锁,信号量