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Flask is a micro web framework written in Python.It is classified as a microframework because it does not require particular tools or libraries. [2] It has no database abstraction layer, form validation, or any other components where pre-existing third-party libraries provide common functions.
Python uses and, or, and not as Boolean operators. Python has a type of expression named a list comprehension, and a more general expression named a generator expression. [78] Anonymous functions are implemented using lambda expressions; however, there may be only one expression in each body.
Below are some of the areas where Python is used: [16] Web Development: Frameworks like Django and Flask have allowed web developers to create robust web servers that can also take advantage of the wider Python ecosystem. Science and Academia: Scientific and data libraries, like SciPy and Pandas, have enabled Python's use in scientific research ...
It consists of an object-relational mapper (ORM) that mediates between data models (defined as Python classes) and a relational database ("Model"), a system for processing HTTP requests with a web templating system ("View"), and a regular-expression-based URL dispatcher ("Controller"). Also included in the core framework are:
A scripting language can be a general purpose language or a domain-specific language for a particular environment. When embedded in an application, it may be called an extension language.
This allows a programmer to process a list of objects of class Animal, telling each in turn to eat (by calling Eat), without needing to know what kind of animal may be in the list, how each animal eats, or what the complete set of possible animal types might be. In C, the mechanism behind virtual functions could be provided in the following manner:
Let C be a category with finite products and a terminal object 1. A list object over an object A of C is: an object L A, a morphism o A : 1 → L A, and; a morphism s A : A × L A → L A; such that for any object B of C with maps b : 1 → B and t : A × B → B, there exists a unique f : L A → B such that the following diagram commutes:
In object-oriented programming, a factory is an object for creating other objects; formally, it is a function or method that returns objects of a varying prototype or class [1] from some method call, which is assumed to be new. [a] More broadly, a subroutine that returns a new object may be referred to as a factory, as in factory method or ...