Cerberus alternative
Project description
Sureberus
This is an implementation of the Cerberus schema format. It doesn't implement all of the features of that library, and where it does implement a feature it doesn't always implement it in the exact same way.
The main reason it exists is to support some of the things that Cerberus doesn't do
normalization inside of *of-rules
The primary important difference is that you can use sureberus if you want to
use default or coerce inside of a
*of-rule.
Nullable in the face of *of-rules
Sureberus allows you to use nullable even if you have *of-rules that have
type constraints. A nullable schema always allows None.
A slightly nicer schema syntax
If you want to construct a schema from Python code instead of storing it as JSON, sureberus provides a more terse syntax for it:
Here's a standard dict-based schema, using an 80-character limit and strict newline/indent-based line wrapping:
myschema = {
'type': 'dict',
'anyof': [
{'schema': {'gradient': {'type': 'string'}}},
{
'schema': {
'image': {'type': 'string'},
'opacity': {'type': 'integer', 'default': 100},
}
},
],
}
And here is a sureberus.schema-based schema, using the same line-wrapping
rules:
from sureberus.schema import Dict, SubSchema, String, Integer
myschema = Dict(
anyof=[
SubSchema(gradient=String()),
SubSchema(image=String(), opacity=Integer(default=100))
]
)
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