特殊字符处的Python re.finditer错误

我的代码循环遍历一系列字符串,然后循环遍历另一个字符串中出现的每个字符串。直到它到达一个以问号(?)开头的字符串为止,这似乎一直有效?一) 。

这是代码。

dtID = 0
for datum in sorted(datumList, key=operator.attrgetter('Sum'), reverse = True):
    datum.ID = dtID
    for foundDatum in re.finditer(datum.Name, text):
        datumLocList.append(DatumLoc(dtID,foundDatum.start()))
    dtID += 1

我怎样才能解决这个问题?

Traceback (most recent call last):
  File "C:\Users\trist\Documents\Python\The Compressor\The Compressor.py", line 97, in <module>
    compress()
  File "C:\Users\trist\Documents\Python\The Compressor\The Compressor.py", line 73, in compress
    for foundDatum in re.finditer(datum.Name, text):
  File "C:\Program Files\Python37\lib\re.py", line 230, in finditer
    return _compile(pattern, flags).finditer(string)
  File "C:\Program Files\Python37\lib\re.py", line 286, in _compile
    p = sre_compile.compile(pattern, flags)
  File "C:\Program Files\Python37\lib\sre_compile.py", line 764, in compile
    p = sre_parse.parse(p, flags)
  File "C:\Program Files\Python37\lib\sre_parse.py", line 930, in parse
    p = _parse_sub(source, pattern, flags & SRE_FLAG_VERBOSE, 0)
  File "C:\Program Files\Python37\lib\sre_parse.py", line 426, in _parse_sub
    not nested and not items))
  File "C:\Program Files\Python37\lib\sre_parse.py", line 651, in _parse
    source.tell() - here + len(this))
re.error: nothing to repeat at position 0