Python Testing with pytest, Second Edition: coverage commands (page 123)

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The shell commands at the top of the page use test_code.py rather than ch7. They should be:

$ pytest --cov=cards --cov-report=html ch7 
​$ ​​pytest​​ ​​--cov=cards​​ ​​ch7 ​$ ​​coverage​​ ​​html​