用圆括号自动替换圆括号

Question

我有以下文字：

text = "The equation is Ue^(jα)."

当第一个圆括号前面有(时，我想用{括号自动替换^括号。

所以我尝试了：

text = "The equation is Ue^(jα). Some brackets like those () should stay. If this symbol ^ is alone nothing should happen. "
text = re.sub(r'^((.*?))<',r'^{\1} ', text)
text

...但是它似乎不起作用。知道如何使它起作用吗？

应该保留诸如()之类的括号。如果单独使用此符号^，则什么也不会发生。

Answer 1

您忘了逃脱一些字符：

>>> text = "The equation is Ue^(jα). Some brackets like those () should stay. If this symbol ^ is alone nothing should happen. "
>>> re.sub(r'\^\((.*?)\)',r'^{\1} ', text)
'The equation is Ue^{jα} . Some brackets like those () should stay. If this symbol ^ is alone nothing should happen. '