On 12/29/2023 10:02 AM, Karsten Hilbert via Python-list wrote:
Am Fri, Dec 29, 2023 at 07:49:17AM -0700 schrieb Mats Wichmann via Python-list:I am not sure why mypy thinks this gmPG2.py:554: error: Argument "queries" to "run_rw_queries" has incompatible type "List[Dict[str, str]]"; expected "List[Dict[str, Union[str, List[Any], Dict[str, Any]]]]" [arg-type] rows, idx = run_rw_queries(link_obj = conn, queries = queries, return_data = True) ^~~~~~~ should be flagged. The intent is for "queries" to be a list of dicts with keys of str and values of str OR list of anything OR dict with keys of str and values of anything I'd have thunk list[dict[str,str]] matches that ?Dict[str, str] means the key type and value type should both be strings,Indeed, I know that much, list[dict[str, str]] is what is getting passed in in this particular invocation of run_rw_queries(). For what it's worth here's the signature of that function: def run_rw_queries ( link_obj:_TLnkObj=None, queries:list[dict[str, str | list | dict[str, Any]]]=None, end_tx:bool=False, return_data:bool=None, get_col_idx:bool=False, verbose:bool=False ) -> tuple[list[dbapi.extras.DictRow], dict[str, int] | None]: Given that I would have thought that passing in list[dict[str, str]] for "queries" ought to be type safe. Mypy indicates otherwise which I am not grokking as to why.but in your retelling above you indicate lots of possible value types... actually the mypy guess seems to be a pretty good recreation of your psuedo-code description.I agree that mypy's grasp of my intent from queries:list[dict[str, str | list | dict[str, Any]]]=None, into "List[Dict[str, Union[str, List[Any], Dict[str, Any]]]]" seems accurate. I just don't understand why list[dict[str, str]] should not pass that construct.
Maybe better to ask the mypy people directly.
Karsten -- GPG 40BE 5B0E C98E 1713 AFA6 5BC0 3BEA AC80 7D4F C89B
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