new_contents: from great_expectations.expectations.regex_based_column_map_expectation import (
      RegexBasedColumnMapExpectation,
  )
  
  
  class ExpectColumnValuesToHaveValidICD10CodeFormat(RegexBasedColumnMapExpectation):
      """Checks if each value matches a regex for ICD10 codes. Does NOT ensure
      the given code actually exists in any version of the ICD10.
      """
  
      regex_camel_name = "ICD10Codes"
      regex = "[A-Za-z][0-9][A-Za-z0-9](?:\\.[A-Za-z0-9]{0,4})?\\Z"
      semantic_type_name_plural = None
  
      examples = [
          {
              "data": {
                  "valid_icd10": ["Z99.0", "Z08", "J09.X2", "S22.000A"],
                  "invalid_icd10": ["XXX.X", "AA2.01", "2A", "S22.0000A"],
              },
              "tests": [
                  {
                      "title": "positive_test",
                      "exact_match_out": False,
                      "in": {"column": "valid_icd10"},
                      "out": {"success": True},
                      "include_in_gallery": True,
                  },
                  {
                      "title": "negative_test",
                      "exact_match_out": False,
                      "in": {"column": "invalid_icd10"},
                      "out": {"success": False, "unexpected_index_list": [0, 1, 2, 3]},
                  },
              ],
              "test_backends": [{"backend": "pandas", "dialects": None}],
          }
      ]
  
      # Here your regex is used to create a custom metric for this expectation
      map_metric = RegexBasedColumnMapExpectation.register_metric(
          regex_camel_name=regex_camel_name,
          regex_=regex,
      )
  
      # This object contains metadata for display in the public Gallery
      library_metadata = {
          "tags": ["typed-entities", "hackathon"],
          "contributors": [
              "@zachlindsey",
          ],
      }
  
  
  if __name__ == "__main__":
      ExpectColumnValuesToHaveValidICD10CodeFormat().print_diagnostic_checklist()
  
subject: add icd10 regex expectation (#4691)