code: def test_isolated_tokens(self):
      self.check_isolated_token("testing", "NAME_LOWER", "testing")
      self.check_isolated_token("Testing", "NAME_UPPER", "Testing")
      self.check_isolated_token("_testing", "NAME_OTHER", "_testing")
      self.check_isolated_token("*", "ASTERISK")
      self.check_isolated_token(",", "COMMA")
      self.check_isolated_token("=", "EQUAL")
      self.check_isolated_token(":", "COLON")
      self.check_isolated_token("[", "LBRACKET")
      self.check_isolated_token("]", "RBRACKET")
      self.check_isolated_token("{", "LBRACE")
      self.check_isolated_token("}", "RBRACE")
      self.check_isolated_token("(", "LPAREN")
      self.check_isolated_token(")", "RPAREN")
      self.check_isolated_token("...", "ELLIPSIS")
      self.check_isolated_token("->", "RARROW")
      self.check_isolated_token("?", "QUESTIONMARK")
      self.check_isolated_token("32102", "INTEGER", 32102)
      self.check_isolated_token("->", "RARROW")
      self.check_isolated_token('"testing"', "STRING", "testing")
      self.check_isolated_token("'testing'", "STRING", "testing")
  
file_path: datashader/datashader/datashape/tests/test_lexer.py
imports: from __future__ import absolute_import, division, print_function
  import unittest
  from datashader import datashape
  from datashader.datashape import lexer
label_desc: Use image node_id 3 for calling the TestDataShapeLexer obj's underlying member method code with example usage: obj.test_isolated_tokens() without return types