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Writing files in background in Python
Here we are trying to do two tasks at a time, one in the foreground and the other in the background. We’ll write something in the file in the background and of a user input number, will find if it’s an odd or even number.
Doing multiple tasks in one program in python is possible through multithreading in
import threading
import time
class AsyncWrite(threading.Thread):
def __init__(self, text, out):
threading.Thread.__init__(self)
self.text = text
self.out = out
def run(self):
f = open(self.out, "a")
f.write(self.text + '\n')
f.close()
time.sleep(3)
print ("Finished Background file write to " + self.out)
def Main():
message = input("Enter a string to store:" )
background = AsyncWrite(message,'out.txt')
#print threading.enumerate()
background.start()
print ("The program can continue while it writes in another thread")
num = int(input("Entered number is : "))
if (num%2==0):
print("Entered number is Even")
else:
print("Entered number is ODD")
background.join()
print ("Waited until thread was complete")
# print (threading.enumerate())
if __name__ == '__main__':
Main()Output
Enter a string to store:Tutorialspoint The program can continue while it writes in another thread Entered number is : 33 Entered number is ODD Finished Background file write to out.txt Waited until thread was complete
Updated on: 30-Jul-2019
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