In software engineering a software design pattern is a general reusable solution to a commonly occurring problem within a given context in software designIt is not a finished design that can be transformed directly into source or machine codeRather it is a description or template for how to solve a problem that can be used in many different situations. Lets you fit more objects into the available amount of RAM by sharing common parts of state between multiple objects instead of keeping all of the data in each object.
Singleton
The pattern allows you to produce different types and representations of an object using the same construction code.
. The catalog of annotated code examples of all design patterns written in Python. Structural design patterns explain how to assemble objects and classes into larger structures while keeping these structures flexible and efficient.
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