Multithread parameters passing

Question

I have a class thread like this:

import threading, time
class th(threading.Thread):
    def run(self):
        print "Hi"
        time.sleep(5)
        print "Bye"

And now let's say I want every time of "sleeping" different, so I tried:

import treading, time
class th(threading.Thread, n):
    def run(self):
        print "Hi"
        time.sleep(n)
        print "Bye"

It doesn't work, and it give me a message:

group argument must be None for now

So, how do I pass a parameter in the run?

NOTE: I did it with another function in the class like that:

import treading, time
class th(threading.Thread):
    def run(self):
        print "Hi"
        time.sleep(self.n)
        print "Bye"
    def get_param(self, n):
        self.n = n

var = th()
var.get_param(10)
var.start()

abarnert · Accepted Answer · 2013-08-23 00:22:10Z

3

Try this - you want to add the timeout value to the object, so you need the object to have that variable as part of it. You can do that by adding an __init__ function that gets executed when you create the class.

import threading, time
class th(threading.Thread):
    def __init__(self, n):
        self.n = n
    def run(self):
        print "Hi"
        time.sleep(self.n)
        print "Bye"

See more details here.

edited Aug 23, 2013 at 0:22

abarnert

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answered Aug 22, 2013 at 23:58

bbayles

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2 Comments

user2357112 Over a year ago

selfn should be self.n.

Ofek .T. Over a year ago

Thank you. I didn't think about it, it was very helpful.

user2357112 · Accepted Answer · 2013-08-22 23:59:54Z

1

class Th(threading.Thread):
    def __init__(self, n):
        super(Th, self).__init__()
        self.n = n
    def run(self):
        print 'Hi'
        time.sleep(self.n)

Th(4).run()

Define a constructor, and pass the parameter to the constructor. The parentheses on the class line delimit the list of parent classes; n is a parameter, not a parent.

answered Aug 22, 2013 at 23:59

user2357112

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