==============
Data Extractor
==============
|license| |Pypi Status| |Python version| |Package version| |PyPI - Downloads|
|GitHub last commit| |Code style: black| |Build Status| |codecov|
|Documentation Status| |PDM managed|
Combine **XPath**, **CSS Selectors** and **JSONPath** for Web data extracting.
Quickstarts
<<<<<<<<<<<
Installation
~~~~~~~~~~~~
Install the stable version from PYPI.
.. code-block:: shell
pip install "data-extractor[jsonpath-extractor]" # for extracting JSON data
pip install "data-extractor[lxml]" # for extracting HTML data
Or install the latest version from Github.
.. code-block:: shell
pip install "data-extractor[jsonpath-extractor] @ git+https://github.com/linw1995/data_extractor.git@master"
Extract JSON data
~~~~~~~~~~~~~~~~~
Currently supports to extract JSON data with below optional dependencies
- jsonpath-extractor_
- jsonpath-rw_
- jsonpath-rw-ext_
.. _jsonpath-extractor: https://github.com/linw1995/jsonpath
.. _jsonpath-rw: https://github.com/kennknowles/python-jsonpath-rw
.. _jsonpath-rw-ext: https://python-jsonpath-rw-ext.readthedocs.org/en/latest/
install one dependency of them to extract JSON data.
Extract HTML(XML) data
~~~~~~~~~~~~~~~~~~~~~~
Currently supports to extract HTML(XML) data with below optional dependencies
- lxml_ for using XPath_
- cssselect_ for using CSS-Selectors_
.. _lxml: https://lxml.de/
.. _XPath: https://www.w3.org/TR/xpath-10/
.. _cssselect: https://cssselect.readthedocs.io/en/latest/
.. _CSS-Selectors: https://www.w3.org/TR/selectors-3/
Usage
~~~~~
.. code-block:: python3
from data_extractor import Field, Item, JSONExtractor
class Count(Item):
followings = Field(JSONExtractor("countFollowings"))
fans = Field(JSONExtractor("countFans"))
class User(Item):
name_ = Field(JSONExtractor("name"), name="name")
age = Field(JSONExtractor("age"), default=17)
count = Count()
assert User(JSONExtractor("data.users[*]"), is_many=True).extract(
{
"data": {
"users": [
{
"name": "john",
"age": 19,
"countFollowings": 14,
"countFans": 212,
},
{
"name": "jack",
"description": "",
"countFollowings": 54,
"countFans": 312,
},
]
}
}
) == [
{"name": "john", "age": 19, "count": {"followings": 14, "fans": 212}},
{"name": "jack", "age": 17, "count": {"followings": 54, "fans": 312}},
]
Changelog
<<<<<<<<<
v1.0.1
~~~~~~
**Build**
- Supports Python 3.13
Contributing
<<<<<<<<<<<<
Environment Setup
~~~~~~~~~~~~~~~~~
Clone the source codes from Github.
.. code-block:: shell
git clone https://github.com/linw1995/data_extractor.git
cd data_extractor
Setup the development environment.
Please make sure you install the pdm_,
pre-commit_ and nox_ CLIs in your environment.
.. code-block:: shell
make init
make PYTHON=3.7 init # for specific python version
Linting
~~~~~~~
Use pre-commit_ for installing linters to ensure a good code style.
.. code-block:: shell
make pre-commit
Run linters. Some linters run via CLI nox_, so make sure you install it.
.. code-block:: shell
make check-all
Testing
~~~~~~~
Run quick tests.
.. code-block:: shell
make
Run quick tests with verbose.
.. code-block:: shell
make vtest
Run tests with coverage.
Testing in multiple Python environments is powered by CLI nox_.
.. code-block:: shell
make cov
.. _pdm: https://github.com/pdm-project/pdm
.. _pre-commit: https://pre-commit.com/
.. _nox: https://nox.thea.codes/en/stable/
.. |license| image:: https://img.shields.io/github/license/linw1995/data_extractor.svg
:target: https://github.com/linw1995/data_extractor/blob/master/LICENSE
.. |Pypi Status| image:: https://img.shields.io/pypi/status/data_extractor.svg
:target: https://pypi.org/project/data_extractor
.. |Python version| image:: https://img.shields.io/pypi/pyversions/data_extractor.svg
:target: https://pypi.org/project/data_extractor
.. |Package version| image:: https://img.shields.io/pypi/v/data_extractor.svg
:target: https://pypi.org/project/data_extractor
.. |PyPI - Downloads| image:: https://img.shields.io/pypi/dm/data-extractor.svg
:target: https://pypi.org/project/data_extractor
.. |GitHub last commit| image:: https://img.shields.io/github/last-commit/linw1995/data_extractor.svg
:target: https://github.com/linw1995/data_extractor
.. |Code style: black| image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/ambv/black
.. |Build Status| image:: https://github.com/linw1995/data_extractor/workflows/Lint&Test/badge.svg
:target: https://github.com/linw1995/data_extractor/actions?query=workflow%3ALint%26Test
.. |codecov| image:: https://codecov.io/gh/linw1995/data_extractor/branch/master/graph/badge.svg
:target: https://codecov.io/gh/linw1995/data_extractor
.. |Documentation Status| image:: https://readthedocs.org/projects/data-extractor/badge/?version=latest
:target: https://data-extractor.readthedocs.io/en/latest/?badge=latest
.. |PDM managed| image:: https://img.shields.io/badge/pdm-managed-blueviolet
:target: https://pdm.fming.dev
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"description": "==============\nData Extractor\n==============\n\n|license| |Pypi Status| |Python version| |Package version| |PyPI - Downloads|\n|GitHub last commit| |Code style: black| |Build Status| |codecov|\n|Documentation Status| |PDM managed|\n\nCombine **XPath**, **CSS Selectors** and **JSONPath** for Web data extracting.\n\nQuickstarts\n<<<<<<<<<<<\n\nInstallation\n~~~~~~~~~~~~\n\nInstall the stable version from PYPI.\n\n.. code-block:: shell\n\n pip install \"data-extractor[jsonpath-extractor]\" # for extracting JSON data\n pip install \"data-extractor[lxml]\" # for extracting HTML data\n\nOr install the latest version from Github.\n\n.. code-block:: shell\n\n pip install \"data-extractor[jsonpath-extractor] @ git+https://github.com/linw1995/data_extractor.git@master\"\n\nExtract JSON data\n~~~~~~~~~~~~~~~~~\n\nCurrently supports to extract JSON data with below optional dependencies\n\n- jsonpath-extractor_\n- jsonpath-rw_\n- jsonpath-rw-ext_\n\n.. _jsonpath-extractor: https://github.com/linw1995/jsonpath\n.. _jsonpath-rw: https://github.com/kennknowles/python-jsonpath-rw\n.. _jsonpath-rw-ext: https://python-jsonpath-rw-ext.readthedocs.org/en/latest/\n\ninstall one dependency of them to extract JSON data.\n\nExtract HTML(XML) data\n~~~~~~~~~~~~~~~~~~~~~~\n\nCurrently supports to extract HTML(XML) data with below optional dependencies\n\n- lxml_ for using XPath_\n- cssselect_ for using CSS-Selectors_\n\n.. _lxml: https://lxml.de/\n.. _XPath: https://www.w3.org/TR/xpath-10/\n.. _cssselect: https://cssselect.readthedocs.io/en/latest/\n.. _CSS-Selectors: https://www.w3.org/TR/selectors-3/\n\nUsage\n~~~~~\n\n.. code-block:: python3\n\n from data_extractor import Field, Item, JSONExtractor\n\n\n class Count(Item):\n followings = Field(JSONExtractor(\"countFollowings\"))\n fans = Field(JSONExtractor(\"countFans\"))\n\n\n class User(Item):\n name_ = Field(JSONExtractor(\"name\"), name=\"name\")\n age = Field(JSONExtractor(\"age\"), default=17)\n count = Count()\n\n\n assert User(JSONExtractor(\"data.users[*]\"), is_many=True).extract(\n {\n \"data\": {\n \"users\": [\n {\n \"name\": \"john\",\n \"age\": 19,\n \"countFollowings\": 14,\n \"countFans\": 212,\n },\n {\n \"name\": \"jack\",\n \"description\": \"\",\n \"countFollowings\": 54,\n \"countFans\": 312,\n },\n ]\n }\n }\n ) == [\n {\"name\": \"john\", \"age\": 19, \"count\": {\"followings\": 14, \"fans\": 212}},\n {\"name\": \"jack\", \"age\": 17, \"count\": {\"followings\": 54, \"fans\": 312}},\n ]\n\nChangelog\n<<<<<<<<<\n\nv1.0.1\n~~~~~~\n\n**Build**\n\n- Supports Python 3.13\n\n\n\nContributing\n<<<<<<<<<<<<\n\n\nEnvironment Setup\n~~~~~~~~~~~~~~~~~\n\nClone the source codes from Github.\n\n.. code-block:: shell\n\n git clone https://github.com/linw1995/data_extractor.git\n cd data_extractor\n\nSetup the development environment.\nPlease make sure you install the pdm_,\npre-commit_ and nox_ CLIs in your environment.\n\n.. code-block:: shell\n\n make init\n make PYTHON=3.7 init # for specific python version\n\nLinting\n~~~~~~~\n\nUse pre-commit_ for installing linters to ensure a good code style.\n\n.. code-block:: shell\n\n make pre-commit\n\nRun linters. 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