class_docstr: NER Sample class to hold the necessary info and provide atomic operations.
class_docstr_tok: ["NER","Sample","class","to","hold","the","necessary","info","and","provide","atomic","operations","."]
docstr: Delete tokens and their NER tag.
  
  :param str field: field string, normally 'x'
  :param int|list|slice index: int/list/slice
          can be int indicate delete single item
              or their list like [1, 2, 3],
          can be list like (0,3) indicate replace items
              from 0 to 3(not included),
          can be slice which would be convert to list
  :return: Modified NERSample
docstr_tok: ["Delete","tokens","and","their","NER","tag",".",":","param","str","field",":","field","string",",","normally","'","x'",":","param","int|list|slice","index",":","int\/list\/slice","can","be","int","indicate","delete","single","item","or","their","list","like","[","1",",","2",",","3","]",",","can","be","list","like","(","0,3",")","indicate","replace","items","from","0","to","3","(","not","included",")",",","can","be","slice","which","would","be","convert","to","list",":","return",":","Modified","NERSample"]
code: def delete_field_at_index(self, field, index):
      r"""
      Delete tokens and their NER tag.
  
      :param str field: field string, normally 'x'
      :param int|list|slice index: int/list/slice
              can be int indicate delete single item
                  or their list like [1, 2, 3],
              can be list like (0,3) indicate replace items
                  from 0 to 3(not included),
              can be slice which would be convert to list
      :return: Modified NERSample
  
      """
      return self.delete_field_at_indices(field, [index])
  
imports: from .sample import Sample
  from ..field import ListField, TextField
  from ....common.utils.list_op import get_align_seq
label_desc: Use image node_id 8 for calling the NERSample obj's underlying member method code with example usage: obj.delete_field_at_index(field, index) and returns: self