code: def escape(pattern):
      """
      Escape special characters in a string.
      """
      if isinstance(pattern, str):
          return pattern.translate(_special_chars_map)
      else:
          pattern = str(pattern, "latin1")
          return pattern.translate(_special_chars_map).encode("latin1")
  
imports: import enum
  from .None import _compiler, _parser
  import functools
  import _sre
  import copyreg
label_desc: Use image node_id 11 for calling a global function with example usage: escape(pattern) and returns: pattern, pattern