![]() ![]() Your instructor is being unclear at worst, I'm not aware of any one canonical definition of these terms but they might cause confusion for people who have learned very specific definitions from other languages. Dive into advanced Python concepts learn how to apply best practices and coding conventions in your code, learn how to process different kinds of data, and finally learn how to use Object-Oriented Programming, GUI Programming, and Network Programming techniques to implement practical applications and address real-life problems. Technically, in Python, an iterator is an object which implements the iterator protocol, which consist of the methods iter () and next (). ![]() An iterator is an object that can be iterated upon, meaning that you can traverse through all the values. As always, your choice of terms while speaking involves tradeoffs between the audience being able to easily follow you and the audience potentially being led into confusion: if you are talking about memory management probably be as specific as possible, but if you are talking loosely then just use some word your audience understands and be ready to clarify. An iterator is an object that contains a countable number of values. I'd still encourage you to use the specific terminology for the language at hand, and in comparative discussions to define your terms up front. including many functions which return object instances). Whether these qualify as constructors and destructors precisely is a little more debatable (Python docs call the del method a destructor, but tend to be vaguer on what constitutes a constructor, e.g. This is done by defining _ new_ and _ del_ methods to hook object instantiation and del statements. In Python it is possible to manage instance creation and destruction at a finer granularity, though you won't want to unless you know what you're doing. Fundamentally, different languages just come with somewhat different terminology and speaking very clearly will always require adjustment to your subject matter and audience. Problem: The else clause is only a generic one and will run as long as the script was not called directly. if name 'main': print 'Called directly' else: print 'Imported by other python files'. Situation: We know that the below will check if the script has been called directly. But in general, to be explicit and make yourself understood, call it an init method or something other than a constructor. How to find which file was the 'initiator' Python. Of course some people want to call it a constructor because it is used a little bit like a constructor - fundamentally you can call it whatever you want as long as everyone understands what you are actually referring to. ![]() Thus, it is not really a constructor, and talking about it as a constructor might confuse some people. This method is called to initialize the new instance object automatically, first thing after it is constructed. Summary: in this tutorial, youll learn about Python variables and how to use them effectively. Instead, what you should usually do is define an _ init_ method on the class. In almost all usual cases, Python does not have constructors in the same sense used by other OO languages because manually managing memory is generally discouraged. ![]()
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