code: def test_display_value_1(self):
      value = 123456.789
      expected_str = "123,456.789"
      assert display_value(value, ",", ".") == expected_str
  
imports: import unittest
  import numpy
  import pandas
  from shapash.report.common import VarType, series_dtype, numeric_is_continuous, get_callable, display_value, replace_dict_values
label_desc: Use image node_id 12 for calling the TestCommon obj's underlying member method code with example usage: obj.test_display_value_1() without return types