test.py

z = 3
for t in range(2 ** z):
    tbbox = mercantile.bounds(t, t, 3)
    childSt = mercantile.tile(tbbox.west, tbbox.north, 11)
    childEnd = mercantile.tile(tbbox.east, tbbox.north, 11)
    
    print childSt
Tile(x=0, y=-1, z=11)
Tile(x=256, y=256, z=11)
Tile(x=512, y=511, z=11)
Tile(x=768, y=768, z=11)
Tile(x=1024, y=1024, z=11)
Tile(x=1280, y=1280, z=11)
Tile(x=1536, y=1536, z=11)
Tile(x=1792, y=1792, z=11)