An escape error of re.py (re.error: bad escape \s at position 0) in "utils/logloader.py" based on Python3.7

Dear authors,
Thanks for your work. When I ran the file, "MoLFI_demo.py", based on Python3.7, I got the error as following.

Traceback (most recent call last):
  File "~/anaconda3/envs/tf/lib/python3.7/sre_parse.py", line 1021, in parse_template
    this = chr(ESCAPES[this][1])
KeyError: '\\s'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "MoLFI_demo.py", line 14, in <module>
    parser.parse(log_file)
  File "../logparser/MoLFI/MoLFI.py", line 41, in parse
    loader = logloader.LogLoader(self.log_format, self.n_workers)
  File "../logparser/utils/logloader.py", line 38, in __init__
    self.headers, self.regex = self._generate_logformat_regex(self.logformat)
  File "../logparser/utils/logloader.py", line 79, in _generate_logformat_regex
    splitter = re.sub(' +', '\s+', splitters[k])
  File "~/anaconda3/envs/tf/lib/python3.7/re.py", line 192, in sub
    return _compile(pattern, flags).sub(repl, string, count)
  File "~/anaconda3/envs/tf/lib/python3.7/re.py", line 309, in _subx
    template = _compile_repl(template, pattern)
  File "~/anaconda3/envs/tf/lib/python3.7/re.py", line 300, in _compile_repl
    return sre_parse.parse_template(repl, pattern)
  File "~/anaconda3/envs/tf/lib/python3.7/sre_parse.py", line 1024, in parse_template
    raise s.error('bad escape %s' % this, len(this))
re.error: bad escape \s at position 0

I'd be grateful if you could help me.

Please use Python 3.6

You can also try replacing import re to import regex as re

template_regex = re.sub(r'\\ +', r'\s+', template_regex)

what do you mean sub \\ + with \s+ ?

template_regex = re.sub(r'\\ +', r'\s+', template_regex)

what do you mean sub \\ + with \s+ ?
Hi @fuyunliu
I faced same error bad escape sequence error at this line have you solved it?

Traceback (most recent call last):

File "/usr/local/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/sre_parse.py", line 1041, in parse_template
this = chr(ESCAPES[this][1])

KeyError: '\s'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File "/usr/local/lib/python3.9/site-packages/spyder_kernels/py3compat.py", line 356, in compat_exec
exec(code, globals, locals)

File "/Users/devharsh/Downloads/Drain_demo.py", line 28, in
parser.parse(log_file)

File "/Users/devharsh/Downloads/Drain.py", line 293, in parse
self.outputResult(logCluL)

File "/Users/devharsh/Downloads/Drain.py", line 224, in outputResult
self.df_log["ParameterList"] = self.df_log.apply(self.get_parameter_list, axis=1)

File "/usr/local/lib/python3.9/site-packages/pandas/core/frame.py", line 8839, in apply
return op.apply().finalize(self, method="apply")

File "/usr/local/lib/python3.9/site-packages/pandas/core/apply.py", line 727, in apply
return self.apply_standard()

File "/usr/local/lib/python3.9/site-packages/pandas/core/apply.py", line 851, in apply_standard
results, res_index = self.apply_series_generator()

File "/usr/local/lib/python3.9/site-packages/pandas/core/apply.py", line 867, in apply_series_generator
results[i] = self.f(v)

File "/Users/devharsh/Downloads/Drain.py", line 347, in get_parameter_list
template_regex = re.sub(r'\ +', r'\s+', template_regex)

File "/usr/local/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/re.py", line 210, in sub
return _compile(pattern, flags).sub(repl, string, count)

File "/usr/local/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/re.py", line 327, in _subx
template = _compile_repl(template, pattern)

File "/usr/local/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/re.py", line 318, in _compile_repl
return sre_parse.parse_template(repl, pattern)

File "/usr/local/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/sre_parse.py", line 1044, in parse_template
raise s.error('bad escape %s' % this, len(this))

error: bad escape \s

error when I changed import re to import regex as re