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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 simplify_path(path: str, path_prefixes: list = None) -> str: """ Simplifies package paths by replacing path prefixes with values specified in the replacements list :param path: :param path_prefixes: :return: """


    test_path = '{}'.format(path if path else '')
    replacements = (path_prefixes if path_prefixes else []).copy()
    replacements.append(('~', os.path.expanduser('~')))

    for key, value in replacements:
        if test_path.startswith(value):
            return '{}{}'.format(key, test_path[len(value):])

    return test_path