why book snapshot and delta have different data structures?

[lfnt3]

Hello,

@bmoscon
Before I post my question let me express my excitement about this software project! It's an amazing package not only to be used with convenience but also as a source to learn from!

Now to my question.
The bid and ask value pairs of the orderbook datatype are provided as a simple dictionary structures for the snapshot (book).
But the delta bid and ask value pairs are provided as a lists of tuples.

Is there a reason why the delta is not provided as a dict like the snapshot?

Thanks!

[bmoscon]

none that i can think of