code: def __str__(self):
      return f"{self.peer_id.pretty()} {','.join(str(a) for a in self.addrs)}"
  
imports: import hashlib
  from typing import Any, Sequence, Union
  import base58
  import multihash
  from cryptography.hazmat.primitives import serialization
  from multiaddr import Multiaddr, protocols
  from hivemind.proto import crypto_pb2, p2pd_pb2
label_desc: Use image node_id 4 for calling the PeerInfo obj's underlying member method code with example usage: obj.__str__() and returns: self, str, str