Parse mapbox vector tiles with minipb on micropython

schema.py

import minipb
import zlib

value = (('string_value', 'U'),
         ('float_value', 'f'),
         ('double_value', 'd'),
         ('int_value', 't'),
         ('uint_value', 'T'),
         ('sint_value', 'z'),
         ('bool_value', 'b'))

feature = (('id', 'T'),
           ('tags', '#T'),
           ('type', 't'),
           ('geometry', '#T'))

layer = (('name', '*U'),
         ('features', '+[', feature, ']'),
         ('keys', '+U'),
         ('values', '+[', value, ']'),
         ('extent', 'T'),
         ('_', 'x9'),
         ('version', '*T'))

tile = (('_', 'x2'), ('layers', '+[', layer, ']'))

wire = minipb.IterWire(tile)

def unpack(path):
    with open(path, 'rb') as f:
        # adjust between 16+ 8..15 to allocate buffer
        raw = zlib.DecompIO(f, 16+15)
        yield from wire.decode(raw)

for x in unpack('/sd/vtiles/14/8414/5384.pbf'):
   print(x)