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- 2.3 Extended function argument syntax
- es for some parameters, so we do not have to pass all arguments as missing arguments, complete with def... ents in any order if we are assigning keywords to all argument values, otherwise positional ones are th... nt(3) print(1, 20, 10) print('--', '++') </code> All presented invocations of the **print()** function... d function: * ** *args** – refers to a tuple of all additional, not explicitly expected positional ar
- 2.8 Composition vs Inheritance - two ways to the same destination
- this relation is a subclass class that inherits **all** methods and **all** properties of the base class, and allows a subclass to extend everything that ha... could be inherited in this “Vehicles” structure? All classes derived from Vehicles own properties and ... operty from the base class, then it is present in all subclasses. The same principle should apply to t
- 2.6 Abstract classes
- ract methods**. * The programmer has to deliver all method definitions and the completeness would be ... reason is: we want our code to be polymorphic, so all subclasses have to deliver a set of their own met... loper has implemented a subclass that overrides __all__ abstract methods. When we’re designing large f... t to provide common implemented functionality for all implementations of the class, we could also use a
- 2.9 Inheriting properties from built-in classes
- lt, your newly-created class has the advantage of all of the well-known functionalities inherited from ... s to the object. What have we not delivered? * All the remaining methods have remained unchanged, so... ent if you wish; note: you have to teach the code all the lengths used in Europe) * (step 2) Move the... itial characters to the number's end, and convert all letters to upper case (step 02 of the algorithm)
- 1.2 Working with class and instance data – instance variables
- instance variable of any object has no impact on all the remaining objects. Instance variables are com... nstance. Because it is owned by the class itself, all class variables are shared by all instances of the class. They will therefore generally have the same ... value unique to each class. When we iterate over all objects, we can examine the value of this variabl
- 2.2 Inheritance and polymorphism — Inheritance as a pillar of OOP
- d to a specific level of class hierarchy inherits all the traits (methods and attributes) defined insid... its. The new class inherits (and this is the key) all the already existing equipment, but is able to ad... ass TrackedVehicle(LandVehicle): pass</code> All the presented classes are empty for now, as we're... ferent lines being printed; * **polymorphism**: all class instances allow the calling of the turn_on(
- 3.1 Advanced techniques of creating and serving exceptions
- iciently**. This is possible due to the fact that all potential exceptions have their unambiguous names... normally should be used as a last resort to catch all unhandled exceptions. It’s so wide because we don... s a very serious process, you should be sure that all checks are passed. If any fails, it should be mar... heck list script to handle more different checks, all reported as RocketNotReady exceptions. * Add yo
- 5.1 Metaprogramming
- classes with a method (if missing) to ensure that all your classes are equipped with a method named 'gr... etaclass that is responsible for: * equipping all newly instantiated classes with time stamps, pers... ute named ''instantiation_time''; * equipping all newly instantiated classes with the ''get_instant... efficient, then metaclasses should help you. In all other cases, you should agree with Tim Peters tha
- 1.1 Classes, Instances, Attributes, Methods — introduction
- Because an object is a very useful culmination of all the terms described above: * it is an independ... * methods: %%__init__%%, walk, quack — common to all objects so far. Examples: * To call a method, ... the type of class, then type is returned; * in all other cases, it refers to the class that was used
- 2.4 Decorators
- e function to make it able to handle arguments at all call levels. The ''pack_books'' function will be... expressed with functions, is: * classes bring all the subsidiarity they can offer, like inheritance
- 2.1 Python core syntax
- d integers and we know what the result should be, all done by using the “+” operator, but on respective
- 2.7 Encapsulation
- nown as the author of Python, once said: "//We're all consenting adults here//" justifying the absence
- 4.1 Shallow and deep copy operations
- opy()'' method copies the whole object, including all nested objects; it’s an example of practical recu
- 4.2 Serialization of Python objects using the pickle module
- nsmit it via a network. This byte stream contains all the information necessary to reconstruct the obje
- 4.3 Making Python objects persistent using the shelve module
- deserializing parties must abide by the order of all the elements placed into a file or database, or s