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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():
 """Extract description from README.md, for PyPI's usage"""

    try:
        fpath = os.path.join(os.path.dirname(__file__), "README.md")
        with io.open(fpath, encoding="utf-8") as f:
            readme = f.read()
            desc = readme.partition("<!-- start_ppi_description -->")[2]
            desc = desc.partition("<!-- stop_ppi_description -->")[0]
            return desc.strip()
    except IOError:
        return None