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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def coverage():
 """check code coverage quickly with the default Python"""

    run("coverage run --source {PROJECT_NAME} -m py.test".format(PROJECT_NAME=PROJECT_NAME))
    run("coverage report -m")
    run("coverage html")

    webbrowser.open('file://' + os.path.realpath("htmlcov/index.html"), new=2)