start () method:
Start thread activity.
For each thread object is that it can only be called once, it arranged object calls run () method, rather than a thread is currently located in another separate thread, when the method is invoked on the same object more than one thread when once, introduce RuntimeError error.
run () method:
It represents a method of thread activity.
You can override this method in a subclass. Standard run () method call is passed to the adjustable object constructor parameter as a target object, if there is such a parameter, then the sequence are acquired, and keywords from the kargs and args.