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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 split_code(cls, code, PS1, PS2):
 """Splits the given string of code based on the provided PS1 and PS2 symbols. PARAMETERS: code -- str; lines of interpretable code, using PS1 and PS2 prompts PS1 -- str; first-level prompt symbol PS2 -- str; second-level prompt symbol RETURN: list; a processed sequence of lines corresponding to the input code. """

        processed_lines = []
        for line in textwrap.dedent(code).splitlines():
            if not line or line.startswith(PS1) or line.startswith(PS2):
                processed_lines.append(line)
                continue

            assert len(processed_lines) > 0, 'code improperly formatted: {}'.format(code)
            if not isinstance(processed_lines[-1], CodeAnswer):
                processed_lines.append(CodeAnswer())
            processed_lines[-1].update(line)
        return processed_lines