You run pytest test_example.py but get an error: ModuleNotFoundError: No module named 'example'. What is the most likely cause?

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PyTest - Basics and Setup

You run pytest test_example.py but get an error: ModuleNotFoundError: No module named 'example'. What is the most likely cause?

AThe test file imports a module named 'example' which is missing or not installed.

BPytest command syntax is incorrect; it should be <code>pytest -m test_example.py</code>.

CThe test file name is invalid; pytest requires files to start with 'test_'.

DPytest cannot run tests in files with underscores.

Step-by-Step Solution

Solution:

Step 1: Analyze the error message
ModuleNotFoundError means Python cannot find a module that the test file tries to import.
Step 2: Check command and file naming
The command and file name are valid; pytest supports underscores and the syntax is correct.
Final Answer:
The test file imports a module named 'example' which is missing or not installed. -> Option A
Quick Check:
ModuleNotFoundError means missing import module [OK]

Quick Trick: ModuleNotFoundError means missing or misnamed import [OK]

Common Mistakes:

MISTAKES

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