What does setattr function do in this threading code

Question

I am learning a piece of code as follows:

class TestApp(TestWrapper, TestClient):
    def __init__(self, ipaddress, portid, clientid):
    TestWrapper.__init__(self)
    TestClient.__init__(self, wrapper=self)

    self.connect(ipaddress, portid, clientid)

    thread = Thread(target = self.run)
    thread.start()

    setattr(self, "_thread", thread)

    self.init_error()

I am interested in its threading component, I do not understand what setattr does here, can someone please explain?

Many thanks

It's equivalent to self._thread = thread. Have you read the setattr documentation? — Aran-Fey
– Aran-Fey, Commented Oct 4, 2017 at 14:17
Yes, I get that, but I don't why we set an attribute like that. — Liam
– Liam, Commented Oct 4, 2017 at 14:23
We can't possibly know why your code sets that attribute. We don't know anything about the TestApp class or the TestWrapper class or the TestClient class. So my best guess is: You're setting the attribute because you want to access it later. — Aran-Fey
– Aran-Fey, Commented Oct 4, 2017 at 14:37

Dayana · Accepted Answer · 2017-10-04 14:22:08Z

0

setattr(object, name, value)

The function assigns the value to the attribute of the provided object. For example: setattr(objectA, 'attr', 'foo') is equivalent to x.foobar = 'foo'.

In your code: setattr(self, "_thread", thread) is equivalent to self._thread=thread.

For more information you could visit python_setattr

I hope this help you!

answered Oct 4, 2017 at 14:22

Dayana

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1 Comment

Liam Over a year ago

Thanks. I get that, but I still dont know why we set an attribute _thread equals thread?

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