storing arbitrary Python data in Tag object attributes?

[Chris Papademetrious]

Hello fellow soupers,

I would like to store Python data as Tag object attributes (not HTML attributes). For example,

tag.my_cache = {}
tag.my_cache["a"] = 1
tag.my_cache["b"] = 2

It seems like this is okay with the following caveats:

• The attribute name cannot conflict with a name that BS4 uses internally.
• The attribute name would prevent any "convenience child tag" referencing (which I do not use).
  
• The data is not serialized to HTML.
• The data is not duplicated by copy/clone methods.

Am I missing anything?

 - Chris