一、啟動線程
啟動太簡單了,隨便一篇python教程有關多線程的講解都會講到;
二、停止線程
這里分享2種思路,
方法1:(親測可用,就是有點繁瑣了)
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import
inspect
import
ctypes
def
_async_raise(tid, exctype):
"""raises the exception, performs cleanup if needed"""
tid
=
ctypes.c_long(tid)
if
not
inspect.isclass(exctype):
exctype
=
type
(exctype)
res
=
ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
if
res
=
=
0
:
raise
ValueError(
"invalid thread id"
)
elif
res !
=
1
:
# """if it returns a number greater than one, you're in trouble,
# and you should call it again with exc=NULL to revert the effect"""
ctypes.pythonapi.PyThreadState_SetAsyncExc(tid,
None
)
raise
SystemError(
"PyThreadState_SetAsyncExc failed"
)
def
stop_thread(thread):
_async_raise(thread.ident, SystemExit)
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定義完上面的2個函數后,如下一樣調用即可
stop_thread(myThread)
(方法2)(親測可用,就是基本思路,全局變量的使用,python 的基本知識)
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import
threading
import
time
class
MyThread(threading.Thread):
def
__init__(
self
):
threading.Thread.__init__(
self
)
self
.Flag
=
True
#停止標志位
self
.Parm
=
0
#用來被外部訪問的
def
run(
self
):
while
(
True
):
if
(
not
self
.Flag):
break
else
:
time.sleep(
2
)
def
setFlag(
self
,parm):
#外部停止線程的操作函數
self
.Flag
=
parm
#boolean
def
setParm(
self
,parm):
#外部修改內部信息函數
self
.Parm
=
parm
def
getParm(
self
):
#外部獲得內部信息函數
return
self
.Parm
if
__name__
=
=
"__main__"
:
testThread
=
MyThread()
testThread.setDaemon(
True
)
#設為保護線程,主進程結束會關閉線程
testThread.start()
#開始線程
time.sleep(
2
)
#主進程休眠 2 秒
testThread.setFlag(
False
)
#修改線程運行狀態
time.sleep(
2
)
print
(testThread.is_alive())
#查看線程運行狀態
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def
__init__(
self
):
self
.Flag
=
True
#停止標志位
self
.Parm
=
0
#用來被外部訪問的
#自行添加參數
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def
__init__(
self
):
threading.Thread.__init__(
self
)
self
.Flag
=
True
#停止標志位
self
.Parm
=
0
#用來被外部訪問的
|