Strainer: Fast Functional Serializers
Strainer is a different take on serialization and validation in python. It utilizes a functional style over classes.
Strainer officially supports Python 2.6–2.7 & 3.4–3.5, and runs great on PyPy.
Features
- Functional
- Complex Python object serialization
- Data de-serialization
- Data Validation
- Speed
Serialization Example
import datetime
from strainer import (serializer, field, child,
formatters, validators,
ValidationException)
artist_serializer = serializer(
field('name', validators=[validators.required()])
)
album_schema = serializer(
field('title', validators=[validators.required()]),
field('release_date',
validators=[validators.required(), validators.datetime()],
formatters=[formatters.format_datetime()]),
child('artist', serializer=artist_serializer, validators=[validators.required()])
)
class Artist(object):
def __init__(self, name):
self.name = name
class Album(object):
def __init__(self, title, release_date, artist):
self.title = title
self.release_date = release_date
self.artist = artist
bowie = Artist(name='David Bowie')
album = Album(
artist=bowie,
title='Hunky Dory',
release_date=datetime.datetime(1971, 12, 17)
)Now we can serialize, deserialize, and validate data
>>> album_schema.serialize(album)
{'artist': {'name': 'David Bowie'},
'release_date': '1971-12-17T00:00:00',
'title': 'Hunky Dory'}
>>> album_schema.deserialize(album_schema.serialize(album))
{'artist': {'name': 'David Bowie'},
'release_date': datetime.datetime(1971, 12, 17, 0, 0, tzinfo=<iso8601.Utc>),
'title': 'Hunky Dory'}
>>> input = album_schema.serialize(album)
>>> del input['artist']
>>> album_schema.deserialize(input)
ValidationException: {'artist': ['This field is required']}The example has been borrowed from Marshmallow and tweaked.
Installation
To install Strainer, simply:
$ pip install pystrainer
✨🍰✨Satisfaction, guaranteed.
