class_docstr: Convert between text-label and text-index
  Args:
      config: config from yaml file
class_docstr_tok: ["Convert","between","text-label","and","text-index","Args",":","config",":","config","from","yaml","file"]
code: def get_char_num(self):
      return len(self.character)
  
file_path: PaddleHub/modules/image/text_recognition/chinese_ocr_db_crnn_mobile/character.py
imports: import string
  import numpy
label_desc: Use image node_id 4 for calling the CharacterOps obj's underlying member method code with example usage: obj.get_char_num() and returns: len