[TriPython] Nested Properties

[Eric Dill]

Hey Chris,

This is <https://stackoverflow.com/a/41274937> probably the cleanest
implementation of nested attributes that I've seen:

from collections import defaultdict
class AttributeDict(defaultdict):
    def __init__(self):
        super(AttributeDict, self).__init__(AttributeDict)

    def __getattr__(self, key):
        try:
            return self[key]
        except KeyError:
            raise AttributeError(key)
    def __setattr__(self, key, value):
        self[key] = value

Make use of it as follows:

keys = AttributeDict()
keys.abc.xyz.x = 123
keys.abc.xyz.a.b.c = 234

Eric


On Tue, Sep 29, 2020 at 7:58 AM David Johnson <znoop333 at hotmail.com> wrote:

>    IDK if this helps, but google's protobufs can automatically generate
>    python classes with unlimited nested types [1], which is pretty similar
> to
>    nested properties (but it uses python reflection instead of manually
>    defining subclasses or messing with __getattr__). As an added bonus, you
>    can then serialize it to disk or network sockets and read the protobuf
>    binary string into another language [2], which I've found useful for
> going
>    between python for rapid prototyping and a platform-specific language
> for
>    a GUI (such as Android Java code).
>    What is the use-case scenario that brought up the request for nested
>    properties?
>    [1] [1]
> https://developers.google.com/protocol-buffers/docs/proto3#nested
>    [2] [2]
> https://developers.google.com/protocol-buffers/docs/pythontutorial
>
> References
>
>    Visible links
>    1. https://developers.google.com/protocol-buffers/docs/proto3#nested
>    2. https://developers.google.com/protocol-buffers/docs/pythontutorial
> _______________________________________________
> TriZPUG mailing list
> TriZPUG at python.org
> https://mail.python.org/mailman/listinfo/trizpug
> http://tripython.org is the Triangle Python Users Group
>


-- 
Eric Dill, PhD
@chemisist
github.com/ericdill
-------------- next part --------------
   Hey Chris,
   [1]This is probably the cleanest implementation of nested attributes that
   I've seen:

 from collections import defaultdict

 class AttributeDict(defaultdict):
     def __init__(self):
         super(AttributeDict, self).__init__(AttributeDict)

     def __getattr__(self, key):
         try:
             return self[key]
         except KeyError:
             raise AttributeError(key)
     def __setattr__(self, key, value):
         self[key] = value

 Make use of it as follows:

 keys = AttributeDict()
 keys.abc.xyz.x = 123
 keys.abc.xyz.a.b.c = 234

 Eric

   On Tue, Sep 29, 2020 at 7:58 AM David Johnson <[2]znoop333 at hotmail.com>
   wrote:

        IDK if this helps, but google's protobufs can automatically generate
        python classes with unlimited nested types [1], which is pretty
     similar to
        nested properties (but it uses python reflection instead of manually
        defining subclasses or messing with __getattr__). As an added bonus,
     you
        can then serialize it to disk or network sockets and read the
     protobuf
        binary string into another language [2], which I've found useful for
     going
        between python for rapid prototyping and a platform-specific language
     for
        a GUI (such as Android Java code).
        What is the use-case scenario that brought up the request for nested
        properties?
        [1]
     [1][3]https://developers.google.com/protocol-buffers/docs/proto3#nested
        [2]
     [2][4]https://developers.google.com/protocol-buffers/docs/pythontutorial

     References

        Visible links
        1.
     [5]https://developers.google.com/protocol-buffers/docs/proto3#nested
        2.
     [6]https://developers.google.com/protocol-buffers/docs/pythontutorial
     _______________________________________________
     TriZPUG mailing list
     [7]TriZPUG at python.org
     [8]https://mail.python.org/mailman/listinfo/trizpug
     [9]http://tripython.org is the Triangle Python Users Group

   --
   Eric Dill, PhD
   @chemisist
   [10]github.com/ericdill

References

   Visible links
   1. https://stackoverflow.com/a/41274937
   2. mailto:znoop333 at hotmail.com
   3. https://developers.google.com/protocol-buffers/docs/proto3#nested
   4. https://developers.google.com/protocol-buffers/docs/pythontutorial
   5. https://developers.google.com/protocol-buffers/docs/proto3#nested
   6. https://developers.google.com/protocol-buffers/docs/pythontutorial
   7. mailto:TriZPUG at python.org
   8. https://mail.python.org/mailman/listinfo/trizpug
   9. http://tripython.org/
  10. http://github.com/ericdill