IO reading problem when trying to import MNIST datasets.

[hungpham3112]

Step to reproduce:

• using Pluto; Pluto.run()
• Run this code in Pluto:

using LinearAlgebra, MLDatasets, Plots
MNIST()

• See the error.

Environment:

OS: PopOS 22.0.4
Terminal: Alacritty v0.11.0
Julia version: 1.9.1
Pluto version: 0.19.26

Videos:

Screencast.from.06-11-2023.06.03.22.PM.webm

Expectation:

Can download and import MNIST dataset normally.

[oxinabox]

I believe this is because Pluto (unlike jupyter) doesn't redirect reads to stdin into text-input fields.
Last time we talked about this, the response was that "won'tfix: People should use specal Pluto IO methods"
which to me is unsatisfying, since stdio is the lowest common demominator that works with the REPL, and it seems a bit much to expect a library author to be aware of the front-end IDE being used.

The short term fix is to disable the prompt in DataDeps via ENV["DATADEPS_ALWAYS_ACCEPT"] = "true"

[Pangoraw]

Thanks for the report! Interactive use of stdin is not supported (see #765 (comment) for context).
To complement the great DataDeps specific answer from above, you can also replace stdin with a user controlled buffer locally if you wish to do so (maybe there is a Base function to do that already?):