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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 _single_page_pdf(page):
 """Construct a single page PDF from the provided page in memory"""

    pdf = Pdf.new()
    pdf.pages.append(page)
    bio = BytesIO()
    pdf.save(bio)
    bio.seek(0)
    return bio.read()