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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 _cdata_header(self, colsep="|"):
 """ Create a header for the CDATA section, as a visual guide. """

        fields = self.fields
        header_lines = []
        line = ""
        for fieldName in self.field_names:
            width = int(fields[fieldName]['attr']['width'])
            line += self._entry(fieldName, width, colsep)
        header_lines.append(line)

        line = ""
        for fieldName in self.field_names:
            width = int(fields[fieldName]['attr']['width'])
            line += self._entry(fields[fieldName]['attr']['format'], width=width, colsep=colsep)
        header_lines.append(line)

        line = ""
        for fieldName in self.field_names:
            width = int(fields[fieldName]['attr']['width'])
            (l, m) = divmod(width, 10)
            guide = ""
            for i in range(l):
                guide += "".join(map(str, range(10)))
            guide += "".join(map(str, range(m)))
            line += self._entry(guide, width=width, colsep=colsep)
        header_lines.append(line)

        line = ""
        for fieldName in self.field_names:
            width = int(fields[fieldName]['attr']['width'])
            guide = "-" * width
            line += self._entry(guide, width=width, colsep=colsep)
        header_lines.append(line)

        return header_lines