python, multi-threaded application examples

Application python's threading module to open multi-threaded execution program, the program will shorten the running time, the following code demonstrates the multi-threaded applications

#不开启多线程演示
import time,threading
def foo(n):
    print('foo%s'%n)
    time.sleep(1)
def bar(n):
    print('bar%s'%n)
    time.sleep(2)
begin = time.time()
t1 = threading.Thread(target = foo,args = (1,))
t2 = threading.Thread(target = bar,args = (2,))
#t1.start()
#t2.start()
foo(1)
bar(2)
end = time.time()
process_time = end - begin
print('process time is:%s'%(str(process_time)))

The results without turning on the multithreaded above are as follows:

/home/guoming/python/day27/thread.py /usr/bin/python3.6
foo1
bar2
Process Time IS: 3.003460168838501

Process Exit code 0 Finished with
running took three seconds

#改写一下,开启两个线程
import time,threading
def foo(n):
    print('foo%s'%n)
    time.sleep(1)
def bar(n):
    print('bar%s'%n)
    time.sleep(2)
begin = time.time()
t1 = threading.Thread(target = foo,args = (1,))
t2 = threading.Thread(target = bar,args = (2,))
t1.start()
t2.start()
#foo(1)
#bar(2)
end = time.time()
process_time = end - begin
print('process time is:%s'%(str(process_time)))

After opening thread execution results are as follows:

/home/guoming/python/day27/thread.py /usr/bin/python3.6
foo1
bar2,
Process Time IS: .0003719329833984375

Process Finished with code 0 Exit
procedure in less than 1 second