How to decode string address into Pubkey address on Solana

I am querying data from raydium using their SDK, but i am trying to do it in Python instead.So, I am obtaining an address:

<BN: b870e12dd379891561d2e9fa8f26431834eb736f2f24fc2a2a4dff1fd5dca4df>

And I know it correspond to :

PublicKey(DQyrAcCrDXQ7NeoqGgDCZwBvWDcYmFCjSb9JtteuvPpz)]

But anyone know how one could decode the first into the second please, so i could implement this in Python.

Thanks