metagraph bug for sn2

[cmcg99]

Hi,

The bittensor sdk fails when attempting to obtain the metagraph for subnet 2:

import bittensor as bt
bt.Subtensor().subnets.metagraph(2)

This causes the following error:

  File ".../bittensor/metagraph.py", line 500, in _timelock_round
    for variant, value in (entry or {}).items()
                          ^^^^^^^^^^^^^^^^^^^
AttributeError: 'str' object has no attribute 'items'

The commit info fields list for this sn is just a single string value:

import bittensor as bt

client = bt.Subtensor()
committed = client.query_map(bt.storage.Commitments.CommitmentOf, [2])
print(committed[0][1]['info']['fields'])
# ['ResetBondsFlag']

whereas it's expecting a dictionary here:

subtensor/sdk/python/bittensor/metagraph.py

Line 481 in c02a376

for variant, value in (entry or {}).items():

and here:

subtensor/sdk/python/bittensor/metagraph.py

Line 500 in c02a376

for variant, value in (entry or {}).items()

Replacing (entry or {}) with (entry if isinstance(entry, dict) else {}) got me up and running again but I'm not sure that's the way you'd like to address it.

[cmcg99]

woops, i completely forgot to add anyone to this @sam0x17 let me know if this is the correct channel for raising issues or if there is a different way that you prefer

[sam0x17]

@gztensor