如何从 LaTeX 多层括号中提取多维字典？

import relatex = r"int{rac{{d}x}{sqrt{x}}}int x^{2}{sqrt[3]{x}}{d}x"# 提取括号内容matches = re.findall(r"{(.*?)}", latex)# 构造多维字典dict_levels = {}for i, level in enumerate(matches):    dict_levels[str(i)] = level

{'0': '\frac{{d}x}{sqrt{x}}', '1': 'x^{2}{sqrt[3]{x}}'}