相关疑难解决方法(0)

我有一个表格的正则表达式

def parse(self, format_string):
    for m in re.finditer(
        r"""(?: \$ \( ( [^)]+ ) \) )   # the field access specifier
          | (
                (?:
                    \n | . (?= \$ \( ) # any one single character before the '$('
                )
              | (?:
                    \n | . (?! \$ \( ) # any one single character, except the one before the '$('
                )*
            )""",
        format_string,
        re.VERBOSE):
    ...

我想\$ \(用一些自定义简写"常量" 替换所有重复序列(),如下所示:

def parse(self, format_string):
    re.<something>('\BEGIN = \$\(')
    for m in re.finditer( …