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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 unravel_sections(section_data):
 """Unravels section type dictionary into flat list of sections with section type set as an attribute. Args: section_data(dict):
 Data return from py:method::get_sections Returns: list: Flat list of sections with ``sectionType`` set to type (i.e. recitation, lecture, etc) """

        sections = []
        for type, subsection_list in section_data.items():
            for section in subsection_list:
                section['sectionType'] = type
                sections.append(section)
        return sections