On Sun, 29 Nov 2020 at 23:34, Guido van Rossum <gu...@python.org> wrote:
> OTOH if we were to introduce 'let' or 'const' in the language, it would 
> surely be usable to solve a whole bunch of other problems, in addition to 
> giving us a cleaner way to solve the value capture problem.

Well, IMHO let could help the famous misspelled var problem:

myvar = 5
[...]
myvvar = 7  # Whops!

but to work, if let is used somewhere in the scope, all the variables
declared in the scope must be declared with let:

let myvar = 5
myvvar = 7  # SyntaxError

But I'm really unsure that this is what you want.
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