document metagraph + upgrade glossary #19
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MichaelTrestman
changed the title
chideraao
reviewed
Jul 8, 2025
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| ```python | ||
| # Save metagraph for later use | ||
| metagraph.save() |
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i believe this is related to the m = Metagraph(...) definition line from earlier. I'd suggest using m.save() and m.load() in these code examples for consistency
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| This section provides practical examples of working with the Bittensor metagraph using the Python SDK. Each example demonstrates different aspects of metagraph analysis and data extraction. | ||
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| Code examples can be found [here](https://github.com/latent-to/developer-docs/tree/main/static/code-examples/) |
| asyncio.run(main()) | ||
| ``` | ||
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| ### Complete Neuron Information |
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this example returns an error:
Neuron 0:
UID: 0
Hotkey: 5H6vi9RFCQafW9ZXr6R7LDNMt38CTNBzG4grEEdKGGdhBHYp
Coldkey: 5CoRXrWzSQKrRzibFoLF39fKRUmvF2mMZKDvDexfWNR4ikQQ
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
Cell In[39], line 31
28 print(f" ---")
30 if __name__ == "__main__":
---> 31 main()
Cell In[39], line 15, in main()
13 print(f" Hotkey: {neuron.hotkey}")
14 print(f" Coldkey: {neuron.coldkey}")
---> 15 print(f" Stake: τ{neuron.stake:.9f}")
16 print(f" Rank: {neuron.rank}")
17 print(f" Trust: {neuron.trust}")
TypeError: unsupported format string passed to Balance.__format__
| ## Source Code References | ||
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| ### Core Implementation | ||
| - **Metagraph Class**: [`bittensor/bittensor/core/metagraph.py`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/metagraph.py) |
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link returns an empty page
Suggested change
| - **Metagraph Class**: [`bittensor/bittensor/core/metagraph.py`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/metagraph.py) | |
| - **Metagraph Class**: [`bittensor/bittensor/core/metagraph.py`](https://github.com/opentensor/bittensor/blob/master/bittensor/core/metagraph.py) |
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| ### Core Implementation | ||
| - **Metagraph Class**: [`bittensor/bittensor/core/metagraph.py`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/metagraph.py) | ||
| - **Chain Data**: [`bittensor/bittensor/core/chain_data/metagraph_info.py`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/chain_data/metagraph_info.py) |
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Suggested change
| - **Chain Data**: [`bittensor/bittensor/core/chain_data/metagraph_info.py`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/chain_data/metagraph_info.py) | |
| - **Chain Data**: [`bittensor/bittensor/core/chain_data/metagraph_info.py`](https://github.com/opentensor/bittensor/blob/master/bittensor/core/chain_data/metagraph_info.py) |
| - **Mathematical Operations**: [`subtensor/pallets/subtensor/src/epoch/math.rs`](https://github.com/opentensor/subtensor/blob/main/pallets/subtensor/src/epoch/math.rs) | ||
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| ### Key Constants | ||
| - **TAO Stake Weight**: [`bittensor/bittensor/core/settings.py:7`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/settings.py#L7) - `ROOT_TAO_STAKE_WEIGHT = 0.18` |
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Suggested change
| - **TAO Stake Weight**: [`bittensor/bittensor/core/settings.py:7`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/settings.py#L7) - `ROOT_TAO_STAKE_WEIGHT = 0.18` | |
| - **TAO Stake Weight**: [`bittensor/bittensor/core/settings.py:7`](https://github.com/opentensor/bittensor/blob/master/bittensor/core/settings.py#L8) - `ROOT_TAO_STAKE_WEIGHT = 0.18` |
| :::info Cache Location | ||
| Metagraph files are saved to `~/.bittensor/metagraphs/network-{network}/netuid-{netuid}/block-{block_number}.pt` by default. The files are persistent and not temporary. | ||
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| **Source**: [`bittensor/bittensor/core/metagraph.py:96-115`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/metagraph.py#L96-L115) |
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Suggested change
| **Source**: [`bittensor/bittensor/core/metagraph.py:96-115`](https://github.com/opentensor/bittensor/blob/main/bittensor/core/metagraph.py#L96-L115) | |
| **Source**: [`bittensor/bittensor/core/metagraph.py:96-115`](https://github.com/opentensor/bittensor/blob/master/bittensor/core/metagraph.py#L96-L115) |
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