multithreading in python

1from threading import Thread
2from time import sleep
3
4def threaded_function(arg):
5    for i in range(arg):
6        print("running")
7        sleep(1)
8
9
10if __name__ == "__main__":
11    thread = Thread(target = threaded_function, args = (10, ))
12    thread.start()
13    thread.join()
14    print("thread finished...exiting")

1# A minimal threading example with function calls
2import threading
3import time
4
5def loop1_10():
6    for i in range(1, 11):
7        time.sleep(1)
8        print(i)
9
10threading.Thread(target=loop1_10).start()
11
12# A minimal threading example with an object
13import threading
14import time
15
16
17class MyThread(threading.Thread):
18    def run(self):                                         # Default called function with mythread.start()
19        print("{} started!".format(self.getName()))        # "Thread-x started!"
20        time.sleep(1)                                      # Pretend to work for a second
21        print("{} finished!".format(self.getName()))       # "Thread-x finished!"
22
23def main():
24    for x in range(4):                                     # Four times...
25        mythread = MyThread(name = "Thread-{}".format(x))  # ...Instantiate a thread and pass a unique ID to it
26        mythread.start()                                   # ...Start the thread, run method will be invoked
27        time.sleep(.9)                                     # ...Wait 0.9 seconds before starting another
28
29if __name__ == '__main__':
30    main()

1from multiprocessing.pool import ThreadPool
2
3def stringFunction(value):
4    my_str = 3 + value
5    return my_str
6
7
8def stringFunctio(value):
9    my_str = 33 + value
10    return my_str
11
12
13
14pool = ThreadPool(processes=1)
15
16    
17thread1 = pool.apply_async(stringFunction,(8,))
18thread2 = pool.apply_async(stringFunctio,(8,))
19
20return_val = thread1.get()
21return_val1 = thread2.get()

1#!/usr/bin/python
2
3import thread
4import time
5
6# Define a function for the thread
7def print_time( threadName, delay):
8   count = 0
9   while count < 5:
10      time.sleep(delay)
11      count += 1
12      print "%s: %s" % ( threadName, time.ctime(time.time()) )
13
14# Create two threads as follows
15try:
16   thread.start_new_thread( print_time, ("Thread-1", 2, ) )
17   thread.start_new_thread( print_time, ("Thread-2", 4, ) )
18except:
19   print "Error: unable to start thread"
20
21while 1:
22   pass

1from multiprocessing.pool import ThreadPool as Pool
2
3pool_size = 10
4pool = Pool(pool_size)
5
6results = []
7
8for region, directory_ids in direct_dict.iteritems():
9    for dir in directory_ids:
10        result = pool.apply_async(describe_with_directory_workspaces,
11                                  (region, dir, username))
12        results.append(result)
13
14for result in results:
15    code, content = result.get()
16    if code == 0:
17        # ...

1# =============================================================================
2# Inhertance
3# =============================================================================
4class A:
5    def feature1(self):
6        print('Feature 1 in process...')
7    def feature2(self):
8        print('Feature 2 in process...')       #Pt.1
9        
10class B:
11    def feature3(self):
12        print('Feature 3 in process...')
13    def feature4(self):
14        print ('Feature 4 in process...')
15        
16a1 = A() 
17
18a1.feature1()
19a1.feature2()
20
21a2 = B()
22
23a2.feature3()
24a2.feature4()
25# THE ABOVE PROGRAM IS A PROGRAM WITHOUT USING INHERITANCE
26        
27# WITH THE USE OF INHERITANCE IS BELOW
28class A:
29    def feature1(self):
30        print('Feature 1 in process...')    
31    def feature2(self):
32        print('Feature 2 in process...')
33        
34class B(A):
35    def feature3(self):
36        print('Feature 3 in process...')    # Pt.2
37    def feature4(self):
38        print ('Feature 4 in process...')
39        
40a1 = A() 
41
42a1.feature1()
43a1.feature2()
44
45a2 = B()
46
47a2.feature3()
48a2.feature4()
49