[Solved] Why is it recommended to keep __init__.py files minimal and avoid heavy code execution inside them? — Ans: Because code in __init__.py runs on every import, slowing startup | Python

Python - Modules and Code Organization

Why is it recommended to keep __init__.py files minimal and avoid heavy code execution inside them?

ABecause __init__.py cannot contain any executable code

BBecause code in __init__.py runs on every import, slowing startup

CBecause Python ignores __init__.py content during import

DBecause __init__.py is only for documentation

Step-by-Step Solution

Solution:

Step 1: Understand when __init__.py runs
Code inside __init__.py runs every time the package is imported.
Step 2: Impact of heavy code
Heavy or slow code here delays import and startup of programs using the package.
Final Answer:
Because code in __init__.py runs on every import, slowing startup -> Option B
Quick Check:
Keep __init__.py light to avoid slow imports [OK]

Quick Trick: Avoid heavy code in __init__.py to keep imports fast [OK]

Common Mistakes:

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