code: def where_in(self, field_name, values, exact=False):
          
          field_name = Query.escape_if_needed(field_name)
          self._add_operator_if_needed()
          self.negate_if_needed(field_name)
  
          token = _Token(field_name=field_name, value=self.add_query_parameter(list(Utils.unpack_iterable(values))),
                         token="in", exact=exact)
          token.write = self.rql_where_write(token)
          self._where_tokens.append(token)
  
          return self
docs: Check that the field has one of the specified values
  
          @param str field_name: Name of the field
          @param str values: The values we wish to query
          @param bool exact: Getting the exact query (ex. case sensitive)