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AkideLiu
V2EX  ›  Python

移植 Python 项目到 typescript,如何处理 Python attrs 库呢

  •  
  •   AkideLiu · 2021-12-05 10:35:29 +08:00 · 2254 次点击
    这是一个创建于 1070 天前的主题,其中的信息可能已经有所发展或是发生改变。

    各位彦祖好,最近在把一个 python 写的项目改写成 typescript

    发现原始 python 代码里面使用了大量的 attr.ib(),在 attr.ib()里面有很多的参数比如 cmp ,factory ,converter ,validator 等等。

    初步想法是用 ts class 的 constructor 来实现类似的功能,但是这样的话上面提到的细节参数都需要有单独的验证和处理,请问有什么适用于 typescript 类似于 attr 的库方便实现这样的功能吗?

    attrs 的官方文档 : https://www.attrs.org/en/stable/

    看完官方文档和例子感觉有点像 java 的 lombok

    一段例子如下:

    https://github.com/cs50/compare50/blob/main/compare50/_data.py#L114-L149

    @attr.s(slots=True, frozen=True)
    class Submission:
        """
        :ivar path: the file path of the submission
        :ivar files: list of :class:`compare50.File` objects contained in the submission
        :ivar preprocessor: A function from tokens to tokens that will be run on \
                each file in the submission
        :ivar id: integer that uniquely identifies this submission \
                (submissions with the same path will always have the same id).
        Represents a single submission. Submissions may either be single files or
        directories containing many files.
        """
        _store = IdStore(key=lambda sub: (sub.path, sub.files, sub.large_files, sub.undecodable_files))
    
        path = attr.ib(converter=pathlib.Path, cmp=False)
        files = attr.ib(cmp=False)
        large_files = attr.ib(factory=tuple, converter=_to_path_tuple, cmp=False, repr=False)
        undecodable_files = attr.ib(factory=tuple, converter=_to_path_tuple, cmp=False, repr=False)
        preprocessor = attr.ib(default=lambda tokens: tokens, cmp=False, repr=False)
        is_archive = attr.ib(default=False, cmp=False)
        id = attr.ib(init=False)
    
    
        def __attrs_post_init__(self):
            object.__setattr__(self, "files", tuple(
                [File(pathlib.Path(path), self) for path in self.files]))
            object.__setattr__(self, "id", Submission._store[self])
    
        def __iter__(self):
            return iter(self.files)
    
        @classmethod
        def get(cls, id):
            """Retrieve submission corresponding to specified id"""
            return cls._store.objects[id]
    
    3 条回复    2021-12-05 17:09:07 +08:00
    Opportunity
        1
    Opportunity  
       2021-12-05 14:46:50 +08:00
    gouflv
        2
    gouflv  
       2021-12-05 16:39:31 +08:00 via iPhone
    class-transformer + class-validator
    pengtdyd
        3
    pengtdyd  
       2021-12-05 17:09:07 +08:00
    改啥改,又不是不能用
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