This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
Ned Batchelder
nedbat.com
did:plc:w225kiqaw67ddpex4jmoo7rs
I got a lot of replies with suggestions, so here are more #Python expressions to check if a (possibly empty) string has only 0's and 1's in it:
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2024-12-04T12:30:45.355Z