---
title: "What are meta classes in Python?"  
description: "What are meta classes in Python?"  
author: "Ashutosh Patel"  
published: 2025-03-24  
updated: 2025-04-01  
canonical: https://www.mindstick.com/forum/161334/what-are-meta-classes-in-python  
category: "python"  
tags: ["python", "meta class"]  
reading_time: 2 minutes  

---

# What are meta classes in Python?

What are [meta](https://www.mindstick.com/blog/63662/a-comprehensive-guide-to-a-phd-thesis-meta-analysis-know-why-and-how) classes in Python?

## Replies

### Reply by Khushi Singh

In Python, `metaclasses` are specific classes that control the behavior of other classes. A metaclass manages the existence of other classes by defining their creation process and structure. Metaclasses also determine class interpretation.

## How Metaclasses Work

The interpreter employs a `metaclass` to build new classes in Python programming. The built-in type forms the Python `metaclass` and thus enables a type to serve as both a type checker and a class creator.

## Creating a Metaclass

To build a custom `metaclass`, programmers need to subclass type. The key way to modify a `metaclass` involves extending either the `__new__` or `__init__` functions.

```python
class CustomMeta(type):
   def __new__(cls, name, bases, dct):
       print(f"Creating class: {name}")
       return super().__new__(cls, name, bases, dct)
class MyClass(metaclass=CustomMeta):
   pass
```

## Use Cases of Metaclasses

- Programming metaclasses automatically modify class attributes and apply naming standard rules during enforcement.
- Metaclasses implement the Singleton Pattern to authorize a single instance of any class.
- Automatic Method Registration enables systems that require automatic registration of specific methods.

Advanced features belong to `metaclasses`, which primarily serve to control the creation of classes at runtime. Custom metaclasses serve powerful purposes in [Python](https://www.mindstick.com/blog/33372/10-reasons-why-you-should-learn-python) development especially during complex framework and API design but standard programs typically function without them.


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