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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 get_long_description():
 """ Returns the long description of HaTeMiLe for Python. :return: The long description of HaTeMiLe for Python. :rtype: str """


    with open(
        os.path.join(BASE_DIRECTORY, 'README.md'),
        'r',
        encoding='utf-8'
    ) as readme_file:
        return readme_file.read()