class_docstr: Calculates the number of characters in a given string, including whitespace and punctuation.
  
  Description:
      Returns the number of characters in a string. This is equivalent to the length of a string.
  
  Examples:
      >>> num_characters = NumCharacters()
      >>> num_characters(['This is a string',
      ...                 'second item',
      ...                 'final1']).tolist()
      [16, 11, 6]
code: def get_function(self):
      def character_counter(array):
          def _get_num_characters(elem):
              """Returns the length of elem, or pd.NA given null input"""
              if pd.isna(elem):
                  return pd.NA
              return len(elem)
  
          return array.apply(_get_num_characters)
  
      return character_counter
  
file_path: featuretools/featuretools/primitives/standard/transform/natural_language/num_characters.py
imports: import pandas
  from woodwork.column_schema import ColumnSchema
  from woodwork.logical_types import IntegerNullable, NaturalLanguage
  from featuretools.primitives.base import TransformPrimitive
  from featuretools.utils.gen_utils import Library
label_desc: Use image node_id 1 for calling the NumCharacters obj's underlying member method code with example usage: obj.get_function() and returns: character_counter, array, len, pd