Make 2 functions run at the same time.

Question

Hi, I am trying to make 2 functions run at the same time.

def func1():
    print 'Working'

def func2():
    print 'Working'

func1()
func2()

Does anyone know how to do this?

Answer 1

Do this:

import threading
from threading import Thread

def func1():
    print 'Working'

def func2():
    print 'Working'

if __name__ == '__main__':
    Thread(target = func1).start()
    Thread(target = func2).start()

Answer 2

What does the "same time" mean?

Answer 3

The answer about threading is good, but you need to be a bit more specific about what you want to do.

If you have two functions that both use a lot of CPU, threading (in CPython) will probably get you nowhere. Then you might want to have a look at the multiprocessing module or possibly you might want to use jython/IronPython.

If CPU-bound performance is the reason, you could even implement things in (non-threaded) C and get a much bigger speedup than doing two parallel things in python.

Without more information, it isn't easy to come up with a good answer.

Answer 4

this Can be Done with The Help Of Threading.... here i m using Java...

import java.lang.*;                  // imports the packages
class Viz 
{
    public static void main(String[] args)
    {
        Thread t1 = new Run1();
        Thread t2 = new Run2();
        t1.start();
        t2.start();
    }
}
class Run1 extends Thread
{
    public run()                        // your Func1
    {
        -----------
        -----------
    }
}
// the Name of Func Must Be "run()"....
class Run2 extends Thread
{
    public run()                        // your Func2
    {
        -----------
        -----------
    }
}

Answer 5

In python 2.6 and 3 you can use also the multiprocessing module.

multiprocessing is a package that supports spawning processes using an API similar to the threading module. The multiprocessing package offers both local and remote concurrency, effectively side-stepping the Global Interpreter Lock by using subprocesses instead of threads. Due to this, the multiprocessing module allows the programmer to fully leverage multiple processors on a given machine. It runs on both Unix and Windows.

You have additional examples here. For each function you make:

func1 = multiprocessing.Process(target=myfunction, args=(myarg1,))
func1.start()