TypeError: object solders.rpc.responses.GetAccountInfoResp can't be used in 'await' expression

[artaasd95]

Hi, I want to instantiate a program account and then fetch it as documentation.

from my_client.accounts import PostAccount
connection = Client("https://api.devnet.solana.com")

addr = PublicKey("...")

acc = await PostAccount.fetch(connection, addr)
if acc is None:
   
    raise ValueError("account not found")


obj = acc.to_json()
print(obj)

acc_from_json = PostAccount.from_json(obj)

This is like documentation. And the error:

TypeError                                 Traceback (most recent call last)
f:\programming\intelligent_dex\core_calculations\tests.ipynb Cell 8 in <cell line: 4>()
      [1](vscode-notebook-cell:/f%3A/programming/intelligent_dex/core_calculations/tests.ipynb#X11sZmlsZQ%3D%3D?line=0) # fetch an account
      [2](vscode-notebook-cell:/f%3A/programming/intelligent_dex/core_calculations/tests.ipynb#X11sZmlsZQ%3D%3D?line=1) addr = PublicKey("FJLoTgfa5QErRQXsKJrx2ULipJQBRfxVd5zs1jzA18W3")
----> [4](vscode-notebook-cell:/f%3A/programming/intelligent_dex/core_calculations/tests.ipynb#X11sZmlsZQ%3D%3D?line=3) acc = await PostAccount.fetch(connection, addr)
      [5](vscode-notebook-cell:/f%3A/programming/intelligent_dex/core_calculations/tests.ipynb#X11sZmlsZQ%3D%3D?line=4) if acc is None:
      [6](vscode-notebook-cell:/f%3A/programming/intelligent_dex/core_calculations/tests.ipynb#X11sZmlsZQ%3D%3D?line=5)     # the fetch method returns null when the account is uninitialized
      [7](vscode-notebook-cell:/f%3A/programming/intelligent_dex/core_calculations/tests.ipynb#X11sZmlsZQ%3D%3D?line=6)     raise ValueError("account not found")

File f:\programming\intelligent_dex\core_calculations\my_client\accounts\post_account.py:52, in PostAccount.fetch(cls, conn, address, commitment, program_id)
     44 @classmethod
     45 async def fetch(
     46     cls,
   (...)
     50     program_id: PublicKey = PROGRAM_ID,
     51 ) -> typing.Optional["PostAccount"]:
---> 52     resp = await conn.get_account_info(address, commitment=commitment)
     53     info = resp.value
     54     if info is None:

TypeError: object solders.rpc.responses.GetAccountInfoResp can't be used in 'await' expression

Please help.
Thanks

[kevinheavey]

You need to use AsyncClient, not Client. I recommend using a type checker such as mypy to catch things like this