Python 3.7.4: 're.error: bad escape \\s at position 0'

Question

我的程序看起来像这样：

 import re
# Escape the string, in case it happens to have re metacharacters
my_str = "The quick brown fox jumped"
escaped_str = re.escape(my_str)
# "The\\ quick\\ brown\\ fox\\ jumped"
# Replace escaped space patterns with a generic white space pattern
spaced_pattern = re.sub(r"\\\s+", r"\s+", escaped_str)
# Raises error

错误是这样的：

 Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/home/swfarnsworth/programs/pycharm-2019.2/helpers/pydev/_pydev_bundle/pydev_umd.py", line 197, in runfile
    pydev_imports.execfile(filename, global_vars, local_vars)  # execute the script
  File "/home/swfarnsworth/programs/pycharm-2019.2/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "/home/swfarnsworth/projects/medaCy/medacy/tools/converters/con_to_brat.py", line 255, in <module>
    content = convert_con_to_brat(full_file_path)
  File "/home/swfarnsworth/projects/my_file.py", line 191, in convert_con_to_brat
    start_ind = get_absolute_index(text_lines, d["start_ind"], d["data_item"])
  File "/home/swfarnsworth/projects/my_file.py", line 122, in get_absolute_index
    entity_pattern_spaced = re.sub(r"\\\s+", r"\s+", entity_pattern_escaped)
  File "/usr/local/lib/python3.7/re.py", line 192, in sub
    return _compile(pattern, flags).sub(repl, string, count)
  File "/usr/local/lib/python3.7/re.py", line 309, in _subx
    template = _compile_repl(template, pattern)
  File "/usr/local/lib/python3.7/re.py", line 300, in _compile_repl
    return sre_parse.parse_template(repl, pattern)
  File "/usr/local/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

即使我删除了 '\s+' 之前的两个反斜杠，或者如果我将原始字符串 ( r"\\\s+" ) 转换为常规字符串，我也会收到此错误。我检查了 Python 3.7 文档，看来 \s 仍然是空白的转义序列。

原文由 Steele Farnsworth 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

只需尝试 import regex as re 而不是 import re 。

原文由 NiYanchun 发布，翻译遵循 CC BY-SA 4.0 许可协议