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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 convert_PDF_to_plaintext(fpath, keep_layout=False):
 """Convert PDF to txt using pdftotext. Take the path to a PDF file and run pdftotext for this file, capturing the output. :param fpath: (string) path to the PDF file :return: (list) of unicode strings (contents of the PDF file translated into plaintext; each string is a line in the document.) """

    if keep_layout:
        layout_option = "-layout"
    else:
        layout_option = "-raw"
    status = 0
    doclines = []
    # Pattern to check for lines with a leading page-break character.
    # If this pattern is matched, we want to split the page-break into
    # its own line because we rely upon this for trying to strip headers
    # and footers, and for some other pattern matching.
    p_break_in_line = re.compile(r'^\s*\f(.+)$', re.UNICODE)
    # build pdftotext command:
    cmd_pdftotext = [current_app.config.get("CLASSIFIER_PATH_PDFTOTEXT"),
                     layout_option, "-q",
                     "-enc", "UTF-8", fpath, "-"]
    current_app.logger.debug("* %s" % ' '.join(cmd_pdftotext))
    # open pipe to pdftotext:
    pipe_pdftotext = subprocess.Popen(cmd_pdftotext, stdout=subprocess.PIPE)

    # read back results:
    for docline in pipe_pdftotext.stdout:
        unicodeline = docline.decode("utf-8")
        # Check for a page-break in this line:
        m_break_in_line = p_break_in_line.match(unicodeline)
        if m_break_in_line is None:
            # There was no page-break in this line. Just add the line:
            doclines.append(unicodeline)
        else:
            # If there was a page-break character in the same line as some
            # text, split it out into its own line so that we can later
            # try to find headers and footers:
            doclines.append(u"\f")
            doclines.append(m_break_in_line.group(1))

    current_app.logger.debug(
        "* convert_PDF_to_plaintext found: %s lines of text" % len(doclines)
    )

    # finally, check conversion result not bad:
    if pdftotext_conversion_is_bad(doclines):
        status = 2
        doclines = []

    return (doclines, status)