code: def test_phone_formats(self):
      values = pandas.DataFrame(
          {
              "phone": [
                  "12345678901",
                  "+12345678901",
                  "1(234)567-8901",
                  "1 (234) 567-8901",
                  "1.234.567.8901",
                  "1-234-567-8901",
                  "2345678901",
                  "234.567.8901",
                  "(234)5678901",
                  "(234) 567-8901",
              ]
          }
      )
      result = self.transformer.transform(values)
      self.assertEqual(
          result.tolist(), numpy.repeat("234", len(values)).tolist()
      )
  
imports: import unittest
  import datetime
  import math
  import numpy
  import pandas
  import lore.transformers
label_desc: Use image node_id 2 for calling the TestAreaCode obj's underlying member method code with example usage: obj.test_phone_formats() without return types