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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_from(self, required_for=None):
 """Parse a from section."""

        line = self.next_line()
        if line is None:
            return None
        elif line.startswith(b'from '):
            return line[len(b'from '):]
        elif required_for:
            self.abort(errors.MissingSection, required_for, 'from')
        else:
            self.push_line(line)
            return None