How is it recommended to format indentation in Python code to ensure readability and compliance with style guidelines?

In Python, it is recommended to use 4 spaces for each indentation level. This is the standard described in PEP 8 — the official style guide for Python code. Using tabs is not recommended to avoid display issues in different editors.

Proper indentation ensures code readability and structure, for example:

def greet(name):
    if name:
        print(f"Hello, {name}!")
    else:
        print("Hello, world!")

It is important to maintain consistency throughout the project: either only spaces or only tabs (PEP 8 recommends spaces). Most modern editors and IDEs allow you to configure automatic replacement of tabs with spaces.