线程，进程和协程

python线程

Threading用于特工线程相关的操作，线程是应用程序中工作最小的单元。

 1 import threading
 2 import time
 3 def run(arg):
 4     time.sleep(1)
 5     print("Hello" + str(arg))
 6 for i in range(10):
 7     t = threading.Thread(target = run,args = (i,))
 8     t.start()
 9 print("main thread stop")
10 
11 
12 
13 
14 
15 
16 
17 ###执行结果，切记线程是无序的。
18 main thread stop
19 Hello0
20 Hello3
21 Hello4
22 Hello2
23 Hello1
24 Hello8
25 Hello7
26 Hello6
27 Hello5
28 Hello9

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