code: def clean(cls, data):
      if isinstance(data, list):
          return [d.strip() for d in data]
      return data.strip()
  
file_path: nlpaug/nlpaug/augmenter/char/char_augmenter.py
imports: import string
  import re
  from nlpaug.util import Method
  from nlpaug.util.text.tokenizer import Tokenizer
  from nlpaug import Augmenter
  from nlpaug.util import WarningException, WarningName, WarningCode, WarningMessage
label_desc: Use image node_id 3 for calling the CharAugmenter obj's underlying member method code with example usage: obj.clean(cls, data) and returns: data, unknown