pax_global_header00006660000000000000000000000064150017457010014512gustar00rootroot0000000000000052 comment=682dc1db1a5b9b0533e1dc863813127fad6ede9f python-lazy-model-0.3.0/000077500000000000000000000000001500174570100151065ustar00rootroot00000000000000python-lazy-model-0.3.0/.github/000077500000000000000000000000001500174570100164465ustar00rootroot00000000000000python-lazy-model-0.3.0/.github/ISSUE_TEMPLATE/000077500000000000000000000000001500174570100206315ustar00rootroot00000000000000python-lazy-model-0.3.0/.github/ISSUE_TEMPLATE/bug_report.md000066400000000000000000000006721500174570100233300ustar00rootroot00000000000000--- name: Bug report about: Create a report to help us improve title: "[BUG]" labels: '' assignees: '' --- **Describe the bug** A clear and concise description of what the bug is. **To Reproduce** ```python Please add a code snippet here, that reproduces the problem completely ``` **Expected behavior** A clear and concise description of what you expected to happen. **Additional context** Add any other context about the problem here. python-lazy-model-0.3.0/.github/ISSUE_TEMPLATE/config.yml000066400000000000000000000007661500174570100226320ustar00rootroot00000000000000blank_issues_enabled: true contact_links: - name: Question url: 'https://github.com/roman-right/lazy_model/discussions/new?category=question' about: Ask a question about how to use Lazy Model using github discussions - name: Feature Request url: 'https://github.com/roman-right/lazy_model/discussions/new?category=feature-request' about: > If you think we should add a new feature to Lazy Model, please start a discussion, once it attracts wider support, it can be migrated to an issuepython-lazy-model-0.3.0/.github/workflows/000077500000000000000000000000001500174570100205035ustar00rootroot00000000000000python-lazy-model-0.3.0/.github/workflows/github-actions-lint.yml000066400000000000000000000007161500174570100251160ustar00rootroot00000000000000name: Lint on: [ pull_request ] jobs: lint: strategy: fail-fast: false matrix: python-version: [ 3.12 ] os: [ ubuntu-latest ] runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: python-version: ${{ matrix.python-version }} - name: flake8 install run: pip3 install flake8 - name: lint run: flake8 lazy_model/ tests/python-lazy-model-0.3.0/.github/workflows/github-actions-mypy.yml000066400000000000000000000007661500174570100251530ustar00rootroot00000000000000name: MyPy on: [ pull_request ] jobs: mypy: strategy: fail-fast: false matrix: python-version: [ 3.12 ] os: [ ubuntu-latest ] runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: python-version: ${{ matrix.python-version }} - name: mypy install run: pip3 install mypy types-click types-toml - name: mypy run: mypy lazy_model/ --config-file pyproject.toml python-lazy-model-0.3.0/.github/workflows/github-actions-publish-project.yml000066400000000000000000000010341500174570100272540ustar00rootroot00000000000000name: Publish project on: push: branches: - main jobs: publish_project: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: python-version: 3.12 - name: install poetry uses: abatilo/actions-poetry@v2 with: poetry-version: 1.2 - name: install dependencies run: poetry install - name: publish project run: poetry publish --build --username __token__ --password ${{ secrets.PYPI_TOKEN }}python-lazy-model-0.3.0/.github/workflows/github-actions-tests.yml000066400000000000000000000014251500174570100253100ustar00rootroot00000000000000name: Tests on: [ pull_request ] jobs: run-tests: strategy: fail-fast: false matrix: python-version: [ 3.8, 3.9, "3.10", 3.11, 3.12 ] poetry-version: [ 1.2 ] pydantic-version: [ 1.10.0, 2.10 ] os: [ ubuntu-latest ] runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: python-version: ${{ matrix.python-version }} - name: Run image uses: abatilo/actions-poetry@v2 with: poetry-version: ${{ matrix.poetry-version }} - name: poetry install run: poetry install - name: pydantic install run: poetry add pydantic==${{ matrix.pydantic-version }} - name: run tests run: poetry run pytest python-lazy-model-0.3.0/.gitignore000066400000000000000000000050771500174570100171070ustar00rootroot00000000000000config.cnf *.pyc *.iml */*.pytest* .rnd ### Python template # Byte-compiled / optimized / DLL files __pycache__/ *.py[cod] *$py.class # C extensions *.so # Distribution / packaging .Python build/ develop-eggs/ dist/ downloads/ eggs/ .eggs/ lib/ lib64/ parts/ sdist/ var/ wheels/ *.egg-info/ .installed.cfg *.egg MANIFEST # PyInstaller # Usually these files are written by a python script from a template # before PyInstaller builds the exe, so as to inject date/other infos into it. *.manifest *.spec # Installer logs pip-log.txt pip-delete-this-directory.txt # Unit test / coverage reports htmlcov/ .tox/ .coverage .coverage.* .cache nosetests.xml coverage.xml *.cover .hypothesis/ # Translations *.mo *.pot # Django stuff: *.log .static_storage/ .media/ local_settings.py # Flask stuff: instance/ .webassets-cache # Scrapy stuff: .scrapy # Sphinx documentation docs/_build/ # PyBuilder target/ # Jupyter Notebook .ipynb_checkpoints # pyenv .python-version # celery beat schedule file celerybeat-schedule # SageMath parsed files *.sage.py # Environments .env .venv env/ venv/ ENV/ env.bak/ venv.bak/ # Spyder project settings .spyderproject .spyproject # Rope project settings .ropeproject # mkdocs documentation /site # mypy .mypy_cache/ ### VirtualEnv template # Virtualenv # http://iamzed.com/2009/05/07/a-primer-on-virtualenv/ .Python [Bb]in [Ii]nclude [Ll]ib [Ll]ib64 [Ll]ocal pyvenv.cfg .venv pip-selfcheck.json ### JetBrains template # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839 # User-specific stuff: .idea/**/workspace.xml .idea/**/tasks.xml .idea/dictionaries # Sensitive or high-churn files: .idea/**/dataSources/ .idea/**/dataSources.ids .idea/**/dataSources.xml .idea/**/dataSources.local.xml .idea/**/sqlDataSources.xml .idea/**/dynamic.xml .idea/**/uiDesigner.xml # Gradle: .idea/**/gradle.xml .idea/**/libraries # CMake cmake-build-debug/ cmake-build-release/ # Mongo Explorer plugin: .idea/**/mongoSettings.xml ## File-based project format: *.iws ## Plugin-specific files: # IntelliJ out/ # mpeltonen/sbt-idea plugin .idea_modules/ # JIRA plugin atlassian-ide-plugin.xml # Cursive Clojure plugin .idea/replstate.xml # Crashlytics plugin (for Android Studio and IntelliJ) com_crashlytics_export_strings.xml crashlytics.properties crashlytics-build.properties fabric.properties .idea .pytest_cache docs/api docs/_rst tags tests/assets/tmp src/api_files/storage_dir docker-compose-aws.yml tilt_modules # Poetry stuff poetry.lockpython-lazy-model-0.3.0/.pre-commit-config.yaml000066400000000000000000000005241500174570100213700ustar00rootroot00000000000000repos: - repo: https://github.com/ambv/black rev: 22.12.0 hooks: - id: black language_version: python3.12 - repo: https://github.com/PyCQA/flake8 rev: 6.0.0 hooks: - id: flake8 - repo: https://github.com/pre-commit/mirrors-mypy rev: v0.991 hooks: - id: mypy exclude: ^tests/ python-lazy-model-0.3.0/LICENSE000066400000000000000000000261271500174570100161230ustar00rootroot00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright 2022 Roman Right (Korolev) Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. python-lazy-model-0.3.0/README.md000066400000000000000000000021341500174570100163650ustar00rootroot00000000000000# Lazy parsing for Pydantic models This library provides a lazy interface for parsing objects from dictionaries. During the parsing, it saves the raw data inside the object and parses each field on demand. ## Install poetry ```shell poetry add lazy-model ``` pip ```shell pip install lazy-model ``` ## Usage ```python from lazy_model import LazyModel from pydantic import validator class Sample(LazyModel): i: int s: str @validator("s") def s_upper(cls, v): return v.upper() obj = Sample.lazy_parse({"i": "10", "s": "test"}) # at this point the data is stored in a raw format inside the object print(obj.__dict__) # >>> {'i': NAO, 's': NAO} # NAO - Not An Object. It shows that the field was not parsed yet. print(obj.s) # >>> TEST # Custom validator works during lazy parsing print(obj.__dict__) # >>> {'i': NAO, 's': 'TEST'} # The `s` field was already parsed by this step print(obj.i, type(obj.i)) # >>> 10 # It converted `10` from string to int based on the annotations print(obj.__dict__) # >>> {'i': 10, 's': 'TEST'} # Everything was parsed ```python-lazy-model-0.3.0/lazy_model/000077500000000000000000000000001500174570100172455ustar00rootroot00000000000000python-lazy-model-0.3.0/lazy_model/__init__.py000066400000000000000000000001451500174570100213560ustar00rootroot00000000000000from lazy_model.main import LazyModel from lazy_model.nao import NAO __all__ = ["LazyModel", "NAO"] python-lazy-model-0.3.0/lazy_model/main.py000066400000000000000000000005371500174570100205500ustar00rootroot00000000000000import pydantic major_version = int(pydantic.version.VERSION.split(".")[0]) if major_version == 1: from lazy_model.parser.old import LazyModel # noqa: F401 elif major_version == 2: from lazy_model.parser.new import LazyModel # noqa: F401 else: raise NotImplementedError( f"pydantic version {major_version} not supported" ) python-lazy-model-0.3.0/lazy_model/nao.py000066400000000000000000000001261500174570100203730ustar00rootroot00000000000000class NotAnObject: def __repr__(self): return "NAO" NAO = NotAnObject() python-lazy-model-0.3.0/lazy_model/parser/000077500000000000000000000000001500174570100205415ustar00rootroot00000000000000python-lazy-model-0.3.0/lazy_model/parser/__init__.py000066400000000000000000000000001500174570100226400ustar00rootroot00000000000000python-lazy-model-0.3.0/lazy_model/parser/new.py000066400000000000000000000103001500174570100216760ustar00rootroot00000000000000from typing import Any, Optional, Set, Dict import pydantic_core from pydantic import BaseModel, PrivateAttr, ValidationError, TypeAdapter from pydantic._internal import _fields from lazy_model.nao import NAO ROOT_KEY = "__root__" _object_setattr = object.__setattr__ class LazyModel(BaseModel): _store: Dict[str, Any] = PrivateAttr(default_factory=dict) _lazily_parsed: bool = PrivateAttr(default=False) @classmethod def lazy_parse( cls, data: Dict[str, Any], fields: Optional[Set[str]] = None, ): fields_values = {} field_alias_map = {} if fields is None: fields = set() for name, field in cls.model_fields.items(): fields_values[name] = NAO alias = field.alias or name if alias in fields: field_alias_map[alias] = name field_set = set(fields_values.keys()) m = cls.model_construct(field_set, **fields_values) m._store = data for alias in fields: m._set_attr(field_alias_map[alias], data[alias]) return m def _parse_value(self, name, value): field_type = self.__class__.model_fields.get(name).annotation try: value = TypeAdapter(field_type).validate_python(value) except ValidationError as e: if ( value is None and self.__class__.model_fields.get(name).required is False ): value = None else: raise e return value def parse_store(self): for name in self.__class__.model_fields: self.__getattribute__(name) def _set_attr(self, name: str, value: Any) -> None: """ Stolen from Pydantic. :param name: :param value: :return: TODO rework """ if name in self.__class_vars__: raise AttributeError( f"{name!r} is a ClassVar of `{self.__class__.__name__}` and cannot be set on an instance. " # noqa: E501 f"If you want to set a value on the class, use `{self.__class__.__name__}.{name} = value`." # noqa: E501 ) elif not _fields.is_valid_field_name(name): if ( self.__pydantic_private__ is None or name not in self.__private_attributes__ ): _object_setattr(self, name, value) else: attribute = self.__private_attributes__[name] if hasattr(attribute, "__set__"): attribute.__set__(self, value) # type: ignore else: self.__pydantic_private__[name] = value return elif self.model_config.get("frozen", None): error: pydantic_core.InitErrorDetails = { "type": "frozen_instance", "loc": (name,), "input": value, } raise pydantic_core.ValidationError.from_exception_data( self.__class__.__name__, [error] ) attr = getattr(self.__class__, name, None) if isinstance(attr, property): attr.__set__(self, value) self.__pydantic_validator__.validate_assignment(self, name, value) def __getattribute__(self, item): # If __class__ is accessed, return it directly to avoid recursion if item == "__class__": return super().__getattribute__(item) # If called on the class itself, delegate to super's __getattribute__ if type(self) is type: # Check if self is a class return super(type, self).__getattribute__(item) # For instances, use the object's __getattribute__ to prevent recursion res = object.__getattribute__(self, item) if res is NAO: field_info = self.__class__.model_fields.get(item) alias = field_info.alias or item value = self._store.get(alias, NAO) if value is NAO: value = field_info.get_default() else: value = self._parse_value(item, value) self._set_attr(item, value) res = super(LazyModel, self).__getattribute__(item) return res python-lazy-model-0.3.0/lazy_model/parser/old.py000066400000000000000000000104571500174570100217000ustar00rootroot00000000000000from typing import Any, Optional, Set, Dict from pydantic import BaseModel, PrivateAttr, parse_obj_as, ValidationError from pydantic.error_wrappers import ErrorWrapper from lazy_model.nao import NAO ROOT_KEY = "__root__" object_setattr = object.__setattr__ class LazyModel(BaseModel): _store: Dict[str, Any] = PrivateAttr(default_factory=dict) _lazily_parsed: bool = PrivateAttr(default=False) @classmethod def lazy_parse( cls, data: Dict[str, Any], fields: Optional[Set[str]] = None, **new_kwargs, ): m = cls.__new__(cls, **new_kwargs) # type: ignore if fields is None: fields = set() fields_values: Dict[str, Any] = {} field_alias_map: Dict[str, str] = {} for name, field in cls.__fields__.items(): fields_values[name] = NAO if field.alias in fields: field_alias_map[field.alias] = name object_setattr(m, "__dict__", fields_values) _fields_set = set(fields_values.keys()) object_setattr(m, "__fields_set__", _fields_set) m._init_private_attributes() m._store = data m._lazily_parsed = True for alias in fields: m._set_attr(field_alias_map[alias], data[alias]) return m def _set_attr(self, name, value): """ Stolen from Pydantic. # TODO rework """ field_type = self.__fields__.get(name).annotation try: value = parse_obj_as(field_type, value) except ValidationError as e: if value is None and self.__fields__.get(name).required is False: value = None else: raise e new_values = {**self.__dict__, name: value} for validator in self.__pre_root_validators__: try: new_values = validator(self.__class__, new_values) except (ValueError, TypeError, AssertionError) as exc: raise ValidationError( [ErrorWrapper(exc, loc=ROOT_KEY)], self.__class__ ) known_field = self.__fields__.get(name, None) if known_field: if not known_field.field_info.allow_mutation: raise TypeError( f'"{known_field.name}" has allow_mutation set ' f"to False and cannot be assigned" ) dict_without_original_value = { k: v for k, v in self.__dict__.items() if k != name } value, error_ = known_field.validate( value, dict_without_original_value, loc=name, cls=self.__class__, ) if error_: raise ValidationError([error_], self.__class__) else: new_values[name] = value errors = [] for skip_on_failure, validator in self.__post_root_validators__: if skip_on_failure and errors: continue try: new_values = validator(self.__class__, new_values) except (ValueError, TypeError, AssertionError) as exc: errors.append(ErrorWrapper(exc, loc=ROOT_KEY)) if errors: raise ValidationError(errors, self.__class__) object_setattr(self, "__dict__", new_values) self.__fields_set__.add(name) def parse_store(self): for name in self.__fields__: self.__getattribute__(name) def __getattribute__(self, item): # If __class__ is accessed, return it directly to avoid recursion if item == "__class__": return super().__getattribute__(item) # If called on the class itself, delegate to super's __getattribute__ if type(self) is type: # Check if self is a class return super(type, self).__getattribute__(item) # For instances, use the object's __getattribute__ to prevent recursion res = object.__getattribute__(self, item) if res is NAO: field_info = self.__fields__.get(item) value = self._store.get(field_info.alias, NAO) if value is NAO: value = field_info.get_default() self._set_attr(item, value) res = super(LazyModel, self).__getattribute__(item) return res python-lazy-model-0.3.0/pyproject.toml000066400000000000000000000012221500174570100200170ustar00rootroot00000000000000[tool.poetry] name = "lazy-model" version = "0.3.0" description = "" authors = ["Roman Right "] license = "Apache-2.0" include = ["LICENSE"] readme = "README.md" packages = [{include = "lazy_model"}] [tool.poetry.dependencies] python = ">=3.8,<4.0" pydantic = ">=1.9.0" [tool.poetry.group.dev.dependencies] pytest = "^7.2.0" [tool.black] line-length = 79 include = '\.pyi?$' exclude = ''' /( \.git | \.hg | \.mypy_cache | \.tox | \.venv | _build | buck-out | build | dist )/ ''' [tool.mypy] ignore_missing_imports = true [build-system] requires = ["poetry-core"] build-backend = "poetry.core.masonry.api" python-lazy-model-0.3.0/tests/000077500000000000000000000000001500174570100162505ustar00rootroot00000000000000python-lazy-model-0.3.0/tests/__init__.py000066400000000000000000000000001500174570100203470ustar00rootroot00000000000000python-lazy-model-0.3.0/tests/models.py000066400000000000000000000010231500174570100201010ustar00rootroot00000000000000from typing import List from pydantic import validator, root_validator, Field from lazy_model.main import LazyModel class Simple(LazyModel): i: int s: str @validator("s") def s_upper(cls, v): return v.upper() @root_validator(pre=True) def check_card_number_omitted(cls, values): "i" in values return values class Nested(LazyModel): s: Simple lst: List[Simple] class Inherited(Simple): f: float class WithAlias(LazyModel): i: int = Field(alias="_i_alias") python-lazy-model-0.3.0/tests/test_parsing.py000066400000000000000000000035401500174570100213260ustar00rootroot00000000000000from lazy_model import LazyModel from lazy_model.nao import NAO from tests.models import Simple, Nested, Inherited, WithAlias class TestParsing: def test_simple_parse(self): obj = Simple.lazy_parse({"i": "10", "s": "test"}) assert obj.__dict__["i"] == NAO assert obj.__dict__["s"] == NAO assert obj.i == 10 assert obj.s == "TEST" def test_simple_parse_with_fields(self): obj = Simple.lazy_parse({"i": "10", "s": "test"}, fields={"s"}) assert obj.__dict__["i"] == NAO assert obj.__dict__["s"] == "TEST" assert obj.i == 10 assert obj.s == "TEST" def test_simple_parse_store(self): obj = Simple.lazy_parse({"i": "10", "s": "test"}) obj.parse_store() assert obj.__dict__ == {"i": 10, "s": "TEST"} def test_nested_parse(self): obj = Nested.lazy_parse( { "s": {"i": "10", "s": "test"}, "lst": [{"i": "10", "s": "test"}, {"i": "10", "s": "test"}], } ) assert obj.__dict__ == {"s": NAO, "lst": NAO} assert obj.s == Simple(i=10, s="TEST") assert obj.lst == [Simple(i=10, s="TEST"), Simple(i=10, s="TEST")] def test_inheritance(self): obj = Inherited.lazy_parse({"i": "10", "s": "test", "f": 1.23}) assert obj.__dict__ == {"i": NAO, "s": NAO, "f": NAO} assert obj.i == 10 obj.parse_store() assert obj.__dict__ == {"f": 1.23, "i": 10, "s": "TEST"} def test_with_alias(self): obj = WithAlias.lazy_parse({"_i_alias": 100}) assert obj.__dict__ == {"i": NAO} assert obj.i == 100 def test_with_class(self): class A(LazyModel): def test_func(self): print("test_func") # Test A.__getattribute__(A, "test_func") A().__getattribute__("test_func")