(two while loops and break from first) or should it be broken up in even more classes/definitions ? Anyone suggestion how to solve this.. my solution involves a Global value (switch 0 OR 1) which I'm told not to do either. A separate module for the separate responsibility. Browse other questions tagged python oop design-patterns single-responsibility-principle or ask your own question. Persistence is also taken care of at the bottom. You can apply it to classes, software components, and microservices. Principles ... Python don't force type inheritance For API implementation (So, for reuse code, prefer Composition) If we analyze this schema, you can see how the Single Responsibility Principle is respected. If a class has more than one responsibility, it becomes coupled. . in the software’s specification should be able to affect the specification of the class. And when objects tend to grow too much, I have to decide, ... Python is a decent objectoriented language though, but sometimes it is overhead to write a class for everything. I understand this conceptually, however in this repo an example is given of the single responsibility principle where a class, since is should only have one job, should be limited to one method (besides the __init__). The Single Responsibility Principle states that a class should do one thing and therefore it should have only a single reason to change. Object creation is separated on the right in Factories and the main entry point of our application, one actor one responsibility. Some base points: Python method calls are "expensive" due to its interpreted nature.In theory, if your code is simple enough, breaking down Python code has negative impact besides readability and reuse (which is a big gain for developers, not so much for users).The single responsibility principle (SRP) keeps code readable, is easier to test and maintain. Single Responsibility Principle (SRP) Definition: Every module/class should only have one responsibility and therefore only one reason to change. Relevant Zen: There should be one-- and preferably only one --obvious way to do things The Single Responsibility Principle (SRP) is all about increasing cohesion and decreasing coupling by organizing code around responsibilities. The single responsibility principle is one of the most commonly used design principles in object-oriented programming. Single Responsibility Principle “…You had one job” — Loki to Skurge in Thor: Ragnarok: A class should have only one job. My personal interpretation of the Single Responsibility Principle is: "dealing with one topic". To follow this principle, your class isn’t allowed to have more than one responsibility, e.g., the management of entities or the conversion of data types. Blog Ben Popper is the worst coder in the world: Something awry with my array To state this principle more technically: Only one potential change (database logic, logging logic, and so on.) The Single Responsibility Principle (SRP) states: A class should have only one responsibility. Does the program now seems logical ? Apparently you cannot start a While True loop in the same thread that the Tkinter event loop is operating in (crashes!). Next hurdle. SRP - Single responsibility principle DIP - Dependency inversion principle OCP - Open/closed principle LSP - Liskov substitution principle ISP - Interface segregation principle. The developer of this small repo seems to advocate a one-method per class principle, which would ensure single responsibility. Although beyond my current homework goal, I've now added Class Square and Class Neighbours to the program. HCVL ( python 3.5 ; tkinter) Every function should have a single job. 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