good upload widget?

[Mirek Zvolsky]

For py3/dj2 I need to choose an upload widget (ie. something what I can use easy with widget=...).

At this time for standard documents, not neccessary for pictures (but it could be fine too).

Only one thing is absolutely important for now: attachet files must stay after submit+failed validation.

I see the possibilities aren't great.

What would you recommend to use for now?

Thank you, Mirek