[Solved] You have a package folder named tools with modules calc.py and format.py. You try to run:from tools import calc print(calc.multiply(4, 5))But get ModuleNotFoundError. What is the most likely cause? | Python

Python - Modules and Code Organization

You have a package folder named tools with modules calc.py and format.py. You try to run:

from tools import calc
print(calc.multiply(4, 5))

But get ModuleNotFoundError. What is the most likely cause?

AFunction multiply does not exist in calc.py

BMissing <code>__init__.py</code> file in the tools folder

CSyntax error in import statement

DPython version is too old

Step-by-Step Solution

Solution:

Step 1: Understand ModuleNotFoundError cause
This error often means Python does not recognize the folder as a package.
Step 2: Check package structure requirements
Without __init__.py, Python won't treat 'tools' as a package, causing import failure.
Final Answer:
Missing __init__.py file in the tools folder -> Option B
Quick Check:
__init__.py missing causes ModuleNotFoundError [OK]

Quick Trick: Always add __init__.py to package folders [OK]

Common Mistakes:

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