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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 static(request):
    "Shorthand static URLs. In debug mode, the JavaScript is not minified."
    static_url = settings.STATIC_URL
    prefix = 'src' if settings.DEBUG else 'min'
    return {
        'CSS_URL': os.path.join(static_url, 'stylesheets/css'),
        'IMAGES_URL': os.path.join(static_url, 'images'),
        'JAVASCRIPT_URL': os.path.join(static_url, 'js', prefix),
    }