make some of the dataclass fields read-only
partial_readonly provide a decorator for conveniently making some fields read-only in dataclass. No dependencies other than the Python Standard Library.
partail_readonly, we can easily make some of the fields in
dataclass read-only by creating property related to them. (Notice: We still can't make the origin field read-only, cause it still need to be set while calling
For example, the following code
from dataclasses import dataclass @dataclass class Data: id: int = 0 name: str = '' @property def full_name(self): return self.name
can be written like this by using
from dataclasses import dataclass @dataclass class Data: id: int = 0 _name: 'str alias=full_name' = ''
- Mark a field read-only by adding an underline prefix
- By default, the relative property named like field without underline prefix
_id: intwill generate a property named
- Use string annotation and add
alias=alias_you_wantat the end, and you'll have a property named
_id: 'int alias=security_idwill generate a property named
partial_readonly, simply use
pip install partial_readonly
- Making property read-only by set a getter[ and ban a setter]
- Using AST to build a getter for new property
- The idea about abusing annotation comes from zmitchell/annotation-abuse
Lastest python offer us dataclass for creating some class in convenient way.
But it's not convenient when we want not all the fields be readonly.
- Python >= 3.7
I built this for practicing AST and publish.
I think it work fine.
There are some more easily implementation.
If you sharing some idea about this feature I'll be greatful!
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