id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,pull_request,body,repo,type,active_lock_reason,performed_via_github_app,reactions,draft,state_reason
1303169663,I_kwDOCGYnMM5NrMp_,453,'unclosed file' warning when using insert_upsert_implementation from Python,311257,closed,0,,,1,2022-07-13T09:34:35Z,2022-07-15T21:52:25Z,2022-07-15T21:52:21Z,NONE,,"I'm using the `[insert_upsert_implementation](https://github.com/simonw/sqlite-utils/blob/main/sqlite_utils/cli.py)` function directly in my Python code to import a csv file with all the bells and whistles `sqlite-utils` provides, but I'm getting a resource warning that a io.TextWrapper object is not closed.

The warning goes away when wrapping the code from [this line](https://github.com/simonw/sqlite-utils/blob/42440d6345c242ee39778045e29143fb550bd2c2/sqlite_utils/cli.py#L924) in a try/finally block like:

```
try:
   ...
   ...
finally:
   decoded.close()
```
(might be that `sniff_buffer` must also be closed if non null, but I might be wrong)

I suspect Python closes the reference automatically when the sqlite-utils cli run is done, but since my code doesn't exit, I'm getting the warning.

Alternatively, it'd be cool if the 'import csv/tsv' functionality could be added directly to the Database class.",140912432,issue,,,"{""url"": ""https://api.github.com/repos/simonw/sqlite-utils/issues/453/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed