learnging_threading
原文来自于morvan python,
https://morvanzhou.github.io/tutorials/python-basic/threading
import threading
import time
print threading.active_count()
print threading.enumerate()
print threading.current_thread()5
[<Thread(Thread-4, started daemon 1120)>, <ParentPollerWindows(Thread-3, started daemon 8708)>, <HistorySavingThread(IPythonHistorySavingThread, started 6580)>, <_MainThread(MainThread, started 9940)>, <Heartbeat(Thread-5, started daemon 11164)>]
<_MainThread(MainThread, started 9940)>
def thread_job(a,t):
print "hello %s , welcome to the threading world!. " %a
#print('This is a thread of %s' % threading.current_thread())
print " %s starts. " %a
for i in range(t):
time.sleep(0.1)# 任务间隔0.1s
print " %s ends. " %a
def main():
thread1 = threading.Thread(target=thread_job,args=('Lily',10,))
thread2 = threading.Thread(target=thread_job,args=('Bob',5,))# 定义线程
thread1.start() # 让线程开始工作
thread2.start() # 让线程开始工作
thread1.join()
thread2.join()
print "all done."
if __name__ == '__main__':
main()
hello Lily , welcome to the threading world!. hello Bob , welcome to the threading world!.
Lily starts. Bob starts.
Bob ends.
Lily ends.
all done.
def thread_job(a):
for i in range(len(a)):
a[i]=a[i]**2
#Notice, list object input for function is address input not value input
def main():
data = [[1,2,3],[3,4,5],[4,4,4],[5,5,5]]
threads=[]
for i in range(4):
t = threading.Thread(target=thread_job,args=(data[i],))
threads.append(t)
for t in threads:
t.start()
for t in threads:
t.join()
print "all done."
print data
if __name__ == '__main__':
main()all done.
[[1, 4, 9], [9, 16, 25], [16, 16, 16], [25, 25, 25]]
def job1():
global A
for i in range(10):
A+=1
print('job1',A)
def job2():
global A
for i in range(10):
A+=10
print('job2',A)
if __name__== '__main__':
lock=threading.Lock()
A=0
t1=threading.Thread(target=job1)
t2=threading.Thread(target=job2)
t1.start()
t2.start()
t1.join()
t2.join()('job1', 1) ('job2', 11)
('job2', 23)('job1', 12)
('job2', 34)('job1', 13)
('job2', 44)('job1', 24)
('job2', 56)('job1', 45)
('job1', 46)('job2', 66)
('job1', 67)('job2', 78)
('job1', 68)('job2', 90)
('job1', 79)('job2', 100)
('job1', 80)('job2', 110)
