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In software, a data access object (DAO) is a pattern that provides an abstract interface to some type of database or other persistence mechanism. By mapping application calls to the persistence layer, the DAO provides data operations without exposing database details. This isolation supports the single responsibility principle.
A variety of difficulties arise when considering how to match an object system to a relational database. These difficulties are referred to as the object–relational impedance mismatch. [4] An alternative to implementing ORM is use of the native procedural languages provided with every major database.
an internationalization system, including translations of Django's own components into a variety of languages; a serialization system that can produce and read XML and/or JSON representations of Django model instances; a system for extending the capabilities of the template engine; an interface to Python's built-in unit test framework
Werkzeug (German for "tool") is a utility library for the Python programming language for Web Server Gateway Interface (WSGI) applications. Werkzeug can instantiate objects for request, response, and utility functions. It can be used as the basis for a custom software framework and supports Python 2.7 and 3.5 and later. [20] [21]
Pandas (styled as pandas) is a software library written for the Python programming language for data manipulation and analysis. In particular, it offers data structures and operations for manipulating numerical tables and time series. It is free software released under the three-clause BSD license. [2]
The book was used as the textbook for MIT's former introductory programming course, 6.001, [5] from fall 1984 through its last semester, in fall 2007. [6] Other schools also made use of the book as a course textbook. [7]
Koha is a web-based ILS, with a SQL database (MariaDB or MySQL preferred [citation needed]) back end with cataloguing data stored in MARC and accessible via Z39.50 or SRU. The user interface is very configurable and adaptable and has been translated into many languages. [3] Koha has most of the features that would be expected in an ILS, including:
DB-Library was aided by an industry-wide move from library systems that were tightly linked to a specific language, to library systems that were provided by the operating system and required the languages on that platform to conform to its standards. This meant that a single library could be used with (potentially) any programming language on a ...