azrdev added the comment:

(Sorry for not replying so long, I expected an email notification)

> Why not use string.Template?

because it's so slow

> I think that there may be a good argument to be made for a safe_format with 
> *named* arguments, like string.Template, but not positional arguments.

Yes!

> But that would require some discussion, to decide on the correct behaviour.

What open question(s) do you think of?


For context, I got the idea for this from Qts .arg() which can be chained, see 
<https://doc.qt.io/qt-5/qstring.html#arg>.

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