...t declared as a "new-style" class. Change it like so: class B(object): and it will work. super() and all subclass/superclass stuff only works with new-style classes. I recommend you get in the habit of always typing that (object) on any class definition to make sure it is a new-style class. O...

...ment dealloc. However, if you have any non-object ivars that need special handling (e.g. allocated buffers that you need to free()) you still have to deal with those in dealloc. Furthermore, if you've set yourself as the delegate of any objects, you should un-set that relationship in dealloc (this ...

...t at the instance variable. But the point is, _qux is an instance variable and self.qux (or [self qux]) is the message qux sent to object self. We use the instance variable directly in -dealloc; using the accessor method instead would look like this (though I don't recommend it, for reasons I'll ex...

...ere are two main ideas to wrap your head around: All output is captured, and returned The return keyword really just indicates a logical exit point Thus, the following two script blocks will do effectively the exact same thing: $a = "Hello, World" return $a   $a = "Hello, World" $a return ...

...le string. " "The disadvantage is that you have to quote " "each part, and newlines must be literal as " "usual."; The indentation doesn't matter, since it's not inside the quotes. You can also do this, as long as you take care to escape the embedded newline. Failure to do so, like my first...

So I have difficulty with the concept of *args and **kwargs . 11 Answers 11 ...

If I modify or add an environment variable I have to restart the command prompt. Is there a command I could execute that would do this without restarting CMD? ...

... In order to forcefully let the namenode leave safemode, following command should be executed: bin/hadoop dfsadmin -safemode leave You are getting Unknown command error for your command as -safemode isn't a sub-command for hadoop fs, but it is of hadoop dfsadmin. Also after the above comman...

... How Flask Routing Works The entire idea of Flask (and the underlying Werkzeug library) is to map URL paths to some logic that you will run (typically, the "view function"). Your basic view is defined like this: @app.route('/greeting/<name>') def give_greeting(name): ...

...ls so you can't call underscore by default, but by providing the code used and citing rails as the source this answer is a good one for ruby, It says you can include rails, or just include this function that the rails team wrote and have tested. – Michael Gorman ...