Convert values from one B code to another

This is an example python code that converts B12101 (“temperature/dry-bulb temperature”) values to B22049 (“sea-surface temperature”), performing unit conversions if needed:

# Select B12101 values and convert them to B22049
with tr.query_data({"var": "B12101"}) as cur:
    self.assertEqual(cur.remaining, 26)
    for rec in cur:
        data =
        # This removes the existing value from the database
        # This converts units automatically
        data["B22049"] = data["B12101"]
        # Remove B12101 from data, to avoid reinserting it
        del data["B12101"]