--- title: Python for .NET devs: data types, classes, objects,... description: A comparison guide for .NET developers learning Python, covering how data types, classes, objects, records, and interfaces map between C# and Python. It walks... canonical: https://daily.dev/posts/python-for-net-devs-data-types-classes-objects-records-and-interfaces-wm3tqldpu twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Python for .NET devs: data types, classes, objects, records and interfaces | daily.dev og:description: A comparison guide for .NET developers learning Python, covering how data types, classes, objects, records, and interfaces map between C# and Python. It walks... og:url: https://daily.dev/posts/python-for-net-devs-data-types-classes-objects-records-and-interfaces-wm3tqldpu og:image: https://api.daily.dev/og/posts/Wm3tQlDPU.png og:image:alt: Python for .NET devs: data types, classes, objects, records and interfaces og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Python for .NET devs: data types, classes, objects, records and interfaces **[Code4IT](https://daily.dev/sources/code4it)** · 10 min read · 0 upvotes · 0 comments ## Summary A comparison guide for .NET developers learning Python, covering how data types, classes, objects, records, and interfaces map between C# and Python. It walks through dynamic vs static typing, type hints, dataclasses as the Python equivalent of C# records, and two approaches to interfaces in Python: Abstract Base Classes (nominal, closer to C# abstract classes) and Protocol (structural typing / static duck typing). Includes guidance on when to use each construct and common beginner mistakes when moving from C# to Python. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the Python equivalent of a C# record? The closest standard tool is a dataclass, decorated with @dataclass. Like a C# record, it reduces boilerplate for data-centric classes by auto-generating __init__, __repr__, and __eq__ based on class attributes. Adding frozen=True gives immutability-like behavior, raising a FrozenInstanceError if you try to modify a field afterward, similar to an immutable C# record. _daily.dev readers porting data models from C# to Python can compare dataclass patterns before committing to a design._ ### How do Python Protocols differ from Abstract Base Classes for defining interfaces? Abstract Base Classes (ABC) require explicit inheritance and enforce the contract through a base class, with abstractmethod decorators, making them behave more like C# abstract classes since they can also hold concrete methods. Protocol, from the typing module, instead uses structural typing: a class qualifies as a subtype simply by having matching method signatures, without inheriting from anything, a style known as static duck typing checked by static type checkers rather than at runtime. _developers choosing between nominal and structural typing in Python can weigh these interface patterns before designing an API._ ### Do I need the new keyword to create an object in Python like in C#? No, Python has no separate new keyword. You simply call the class name as if it were a function, for example user = User("Davide"), and it returns an initialized instance. The constructor logic itself lives in the __init__ method rather than a method named after the class, and instance methods must explicitly declare self as the first parameter. _developers moving from C# to Python can revisit core syntax differences like this while building their mental model on daily.dev._ ## Similar posts on daily.dev - [Data Types in Python](https://daily.dev/posts/data-types-in-python-zaecusynu) · Medium · 0 upvotes · 0 comments - [Python Interfaces: Object-Oriented Design Principles Quiz – Real Python](https://daily.dev/posts/python-interfaces-object-oriented-design-principles-quiz-real-python-pxqwxhiix) · Real Python · 0 upvotes · 0 comments - [Supercharge your programming skills with Python superpowers](https://daily.dev/posts/supercharge-your-programming-skills-with-python-superpowers-hgoyiiyt7) · InfoWorld · 0 upvotes · 0 comments - [Type-Safe Python for TypeScript Developers](https://daily.dev/posts/type-safe-python-for-typescript-developers-cbqq4ctgz) · Atomic Spin · 1 upvotes · 0 comments --- Tags: [#general-programming](https://daily.dev/tags/general-programming), [#python](https://daily.dev/tags/python), [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#) [View this post on daily.dev](https://daily.dev/posts/python-for-net-devs-data-types-classes-objects-records-and-interfaces-wm3tqldpu) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Python for .NET devs: data types, classes, objects, records and interfaces","url":"https://daily.dev/posts/python-for-net-devs-data-types-classes-objects-records-and-interfaces-wm3tqldpu","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/python-for-net-devs-data-types-classes-objects-records-and-interfaces-wm3tqldpu"},"datePublished":"2026-10-04T13:06:59.120Z","dateModified":"2026-10-04T13:14:50.302Z","description":"A comparison guide for .NET developers learning Python, covering how data types, classes, objects, records, and interfaces map between C# and Python. 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