[Python] drain log parsing error : re.error: bad escape \s at position 0

how did you fix the problem i'm using the drain code drain from logpai for parsing logs for anomaly detection and i'm stuck in the same problem .
raw input :
081109 203615 148 INFO dfs.DataNode$PacketResponder: PacketResponder 1 for block blk_38865049064139660 terminating

the error:

splitter = re.sub(" +", "\\\s+", splitters[k])
Processed 100.0% of log lines.
---------------------------------------------------------------------------
error Traceback (most recent call last)
<ipython-input-20-29577b162b2c> in <cell line: 0>()
21 log_format, indir=input_dir, outdir=output_dir, depth=depth, st=st, rex=regex
22 )
---> 23 parser.parse(log_file_all)
24
25 ## run on complete dataset

10 frames
/usr/lib/python3.11/re/_parser.py in parse_template(source, state)
1085 except KeyError:
1086 if c in ASCIILETTERS:
-> 1087 raise s.error('bad escape %s' % this, len(this)) from None
1088 lappend(this)
1089 else:

error: bad escape \s at position 0


example of expected output :

LineId Date Time Pid Level Component Content EventId EventTemplate ParameterList
1 081109 203615 148 INFO dfs.DataNode$PacketResponder PacketResponder 1 for block blk_38865049064139660 terminating dc2c74b7 PacketResponder <> for block <> terminating ['1', 'blk_38865049064139660']

i tried :

splitter = re.sub(r" +", r"\\s+", splitters[k])


splitter = re.sub(' +', '\\\s+', splitters[k])


splitter = re.sub(' +', '\\s+', splitters[k])


splitter = re.sub(' +', '\s+', splitters[k])


they all caused the same error :

Processed 100.0% of log lines.
---------------------------------------------------------------------------
error Traceback (most recent call last)
<ipython-input-2-29577b162b2c> in <cell line: 0>()
21 log_format, indir=input_dir, outdir=output_dir, depth=depth, st=st, rex=regex
22 )
---> 23 parser.parse(log_file_all)
24
25 ## run on complete dataset

10 frames
/usr/lib/python3.11/re/_parser.py in parse_template(source, state)
1085 except KeyError:
1086 if c in ASCIILETTERS:
-> 1087 raise s.error('bad escape %s' % this, len(this)) from None
1088 lappend(this)
1089 else:

error: bad escape \s at position 0

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