多執行緒 新增執行緒Thread

今天我們來學習threading模組的一些基本操作，如獲取執行緒數，新增執行緒等。首先別忘了匯入模組：

import threading

import threading

defmain()
:print
(threading.active_count())
if __name__ ==
"__main__"
: main(
)#輸出
1

import threading

defmain()
:print
(threading.
enumerate()
)if __name__ ==
"__main__"
: main(
)#輸出
[<_mainthread(mainthread, started 4790924736
)>
]

import threading

defmain()
:#print(threading.active_count())
#print(threading.enumerate())
print
("currnet thread :"
,threading.current_thread())
if __name__ ==
"__main__"
: main(
)

import threading

defthread_job()
:#python模組中的乙個功能
print
('this is a thread of %s'
% threading.current_thread())
defmain()
: thread = threading.thread(target=thread_job,
)# 定義執行緒，並且把功能傳進去
thread.start(
)# 讓執行緒開始工作
#print(threading.active_count())
print
(threading.
enumerate()
)#print("currnet thread :",threading.current_thread())
if __name__ ==
'__main__'
: main(
)#輸出
this is an added thread,number is
>
[<_mainthread(mainthread, started 4748305856
)>
,1, started 123145447149568
)>
]

import threading

defthread_job()
:print
("this is an added thread,number is %s"
% threading.current_thread)
defmain()
: added_thread = threading.thread(target = thread_job)
added_thread.start(
)print
(threading.active_count())
print
(threading.
enumerate()
)print
("currnet thread :"
,threading.current_thread())
if __name__ ==
"__main__"
: main(
)

this is an added thread,number is

>2[
<_mainthread(mainthread, started 4573492672
)>
]currnet thread :
<_mainthread(mainthread, started 4573492672
)>

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多執行緒 Thread

如果從另外乙個執行緒操作windows窗體上的控制項，就會與主線程產生競爭，造成不可預料的後果，甚至死鎖。因此，windows gui程式設計有乙個規則 只能通過建立控制項的執行緒來操作控制項的資料！實現方法 要從執行緒外操作windows控制項，那麼就要使用invoke或begininvoke方法...