Coverage for /pythoncovmergedfiles/medio/medio/src/airflow/airflow/utils/pydantic.py: 88%

1# Licensed to the Apache Software Foundation (ASF) under one 

2# or more contributor license agreements. See the NOTICE file 

3# distributed with this work for additional information 

4# regarding copyright ownership. The ASF licenses this file 

5# to you under the Apache License, Version 2.0 (the 

6# "License"); you may not use this file except in compliance 

7# with the License. You may obtain a copy of the License at 

8# 

9# http://www.apache.org/licenses/LICENSE-2.0 

10# 

11# Unless required by applicable law or agreed to in writing, 

12# software distributed under the License is distributed on an 

13# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 

14# KIND, either express or implied. See the License for the 

15# specific language governing permissions and limitations 

16# under the License. 

17 

18# This is an util module that makes Pydantic use optional. While we are using Pydantic in the airflow core 

19# codebase, we don't want to make it a hard dependency for all the users of the core codebase, because 

20# it is only used in the serialization and deserialization of the models for Internal API and for nothing 

21# else, and since Pydantic is a very popular library, we don't want to force the users of the core codebase 

22# to install specific Pydantic version - especially that a lot of libraries out there still depend on 

23# Pydantic 1 and our internal API uses Pydantic 2+ 

24 

25from __future__ import annotations 

26 

27from importlib import metadata 

28 

29from packaging import version 

30 

31 

32def is_pydantic_2_installed() -> bool: 

33 try: 

34 return version.parse(metadata.version("pydantic")).major == 2 

35 except ImportError: 

36 return False 

37 

38 

39if is_pydantic_2_installed(): 

40 from pydantic import BaseModel, ConfigDict, PlainSerializer, PlainValidator, ValidationInfo 

41else: 

42 

43 class BaseModel: # type: ignore[no-redef] # noqa: D101 

44 def __init__(self, *args, **kwargs): 

45 pass 

46 

47 class ConfigDict: # type: ignore[no-redef] # noqa: D101 

48 def __init__(self, *args, **kwargs): 

49 pass 

50 

51 class PlainSerializer: # type: ignore[no-redef] # noqa: D101 

52 def __init__(self, *args, **kwargs): 

53 pass 

54 

55 class PlainValidator: # type: ignore[no-redef] # noqa: D101 

56 def __init__(self, *args, **kwargs): 

57 pass 

58 

59 class ValidationInfo: # type: ignore[no-redef] # noqa: D101 

60 def __init__(self, *args, **kwargs): 

61 pass