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https://github.com/dhvcc/rss-parser
typed python RSS parsing module built using xmltodict and pydantic
https://github.com/dhvcc/rss-parser
atom atom-feed atom-parser bs4 gplv3 mit-license pydantic python python-3 python3 rss rss-feed-parser rss-feed-scraper rss-parser typed typed-python xml xml-parser
Last synced: 1 day ago
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typed python RSS parsing module built using xmltodict and pydantic
- Host: GitHub
- URL: https://github.com/dhvcc/rss-parser
- Owner: dhvcc
- License: gpl-3.0
- Created: 2020-10-03T21:42:31.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2024-09-26T10:58:17.000Z (4 months ago)
- Last Synced: 2025-01-13T12:17:34.901Z (9 days ago)
- Topics: atom, atom-feed, atom-parser, bs4, gplv3, mit-license, pydantic, python, python-3, python3, rss, rss-feed-parser, rss-feed-scraper, rss-parser, typed, typed-python, xml, xml-parser
- Language: Python
- Homepage: https://dhvcc.github.io/rss-parser/
- Size: 268 KB
- Stars: 42
- Watchers: 1
- Forks: 4
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Rss parser
[](https://pepy.tech/project/rss-parser)
[](https://pepy.tech/project/rss-parser)
[](https://pepy.tech/project/rss-parser)
[](https://pypi.org/project/rss-parser)
[](https://pypi.org/project/rss-parser)
[](https://pypi.org/project/rss-parser)
[](https://github.com/dhvcc/rss-parser/blob/master/LICENSE)
## About
`rss-parser` is typed python RSS/Atom parsing module built using [pydantic](https://github.com/pydantic/pydantic) and [xmltodict](https://github.com/martinblech/xmltodict)
## Installation
```bash
pip install rss-parser
```
or
```bash
git clone https://github.com/dhvcc/rss-parser.git
cd rss-parser
poetry build
pip install dist/*.whl
```
## V1 -> V2 migration
- `Parser` class was renamed to `RSSParser`
- Models for RSS-specific schemas were moved from `rss_parser.models` to `rss_parser.models.rss`. Generic types are not touched
- Date parsing was changed a bit, now uses pydantic's `validator` instead of `email.utils`, so the code will produce datetimes better, where it was defaulting to `str` before
## Usage
### Quickstart
**NOTE: For parsing Atom, use `AtomParser`**
```python
from rss_parser import RSSParser
from requests import get # noqa
rss_url = "https://rss.art19.com/apology-line"
response = get(rss_url)
rss = RSSParser.parse(response.text)
# Print out rss meta data
print("Language", rss.channel.language)
print("RSS", rss.version)
# Iteratively print feed items
for item in rss.channel.items:
print(item.title)
print(item.description[:50])
# Language en
# RSS 2.0
# Wondery Presents - Flipping The Bird: Elon vs Twitter
#
When Elon Musk posted a video of himself arrivi
# Introducing: The Apology Line
#
If you could call a number and say you’re sorry
```
Here we can see that description is still somehow has
- this is beacause it's placed as [CDATA](https://www.w3resource.com/xml/CDATA-sections.php) like so
```
If you could call ...
]]>
```
### Overriding schema
If you want to customize the schema or provide a custom one - use `schema` keyword argument of the parser
```python
from rss_parser import RSSParser
from rss_parser.models import XMLBaseModel
from rss_parser.models.rss import RSS
from rss_parser.models.types import Tag
class CustomSchema(RSS, XMLBaseModel):
channel: None = None # Removing previous channel field
custom: Tag[str]
with open("tests/samples/custom.xml") as f:
data = f.read()
rss = RSSParser.parse(data, schema=CustomSchema)
print("RSS", rss.version)
print("Custom", rss.custom)
# RSS 2.0
# Custom Custom tag data
```
### xmltodict
This library uses [xmltodict](https://github.com/martinblech/xmltodict) to parse XML data. You can see the detailed documentation [here](https://github.com/martinblech/xmltodict#xmltodict)
The basic thing you should know is that your data is processed into dictionaries
For example, this data
```xml
content
```
will result in the following
```python
{
"tag": "content"
}
```
*But*, when handling attributes, the content of the tag will be also a dictionary
```xml
data
```
Turns into
```python
{
"tag": {
"@attr": "1",
"@data-value": "data",
"#text": "content"
}
}
```
Multiple children of a tag will be put into a list
```xml
content
content2
```
Results in a list
```python
[
{ "tag": "content" },
{ "tag": "content" },
]
```
If you don't want to deal with those conditions and parse something **always** as a list -
please, use `rss_parser.models.types.only_list.OnlyList` like we did in `Channel`
```python
from typing import Optional
from rss_parser.models.rss.item import Item
from rss_parser.models.types.only_list import OnlyList
from rss_parser.models.types.tag import Tag
from rss_parser.pydantic_proxy import import_v1_pydantic
pydantic = import_v1_pydantic()
...
class OptionalChannelElementsMixin(...):
...
items: Optional[OnlyList[Tag[Item]]] = pydantic.Field(alias="item", default=[])
```
### Tag field
This is a generic field that handles tags as raw data or a dictonary returned with attributes
Example
```python
from rss_parser.models import XMLBaseModel
from rss_parser.models.types.tag import Tag
class Model(XMLBaseModel):
width: Tag[int]
category: Tag[str]
m = Model(
width=48,
category={"@someAttribute": "https://example.com", "#text": "valid string"},
)
# Content value is an integer, as per the generic type
assert m.width.content == 48
assert type(m.width), type(m.width.content) == (Tag[int], int)
# The attributes are empty by default
assert m.width.attributes == {} # But are populated when provided.
# Note that the @ symbol is trimmed from the beggining and name is convert to snake_case
assert m.category.attributes == {'some_attribute': 'https://example.com'}
```
## Contributing
Pull requests are welcome. For major changes, please open an issue first
to discuss what you would like to change.
Install dependencies with `poetry install` (`pip install poetry`)
`pre-commit` usage is highly recommended. To install hooks run
```bash
poetry run pre-commit install -t=pre-commit -t=pre-push
```
## License
[GPLv3](https://github.com/dhvcc/rss-parser/blob/master/LICENSE)