try moving import

Author: changhc

src/validators/model_fields.rs

@@ -125,8 +125,6 @@ impl Validator for ModelFieldsValidator {
         // this validator does not yet support partial validation, disable it to avoid incorrect results
         state.allow_partial = false.into();
 
-        let deprecation_warning_type = py.import_bound("builtins")?.getattr("DeprecationWarning")?;
-
         let strict = state.strict_or(self.strict);
         let from_attributes = state.extra().from_attributes.unwrap_or(self.from_attributes);
 
@@ -189,6 +187,7 @@ impl Validator for ModelFieldsValidator {
                         used_keys.insert(lookup_path.first_key());
                     }
                     if let Some(msg) = &field.deprecation_msg {
+                        let deprecation_warning_type = py.import_bound("builtins")?.getattr("DeprecationWarning")?;
                         PyErr::warn_bound(py, &deprecation_warning_type, msg, 2)?;
                     }
                     match field.validator.validate(py, value.borrow_input(), state) {