🔒 Regex to find up to three repeating characters, followed by a space

[tranquil nova]

I can't figure it out, and neither can ChatGPT 😝.

"## Hello ### World ###### Test"

should return ['##', '###']

Please help! Thanks.

edit: I said characters, but specifically I want '#'

[cerulean eagle]

@tranquil nova

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[delicate pelican]

python re docs

{m,n}

Causes the resulting RE to match from `m` to `n` repetitions of the preceding RE, attempting to match as many repetitions as possible. For example, `a{3,5}` will match from 3 to 5 `'a'` characters

so I'm pretty sure you can just match for [^#]#{1,3}

[west lagoon]

You might need some negative lookahead.

Caveat emptor: I'm not a regex person.

No, negative lookbehind.

'#{1,3}(?<!#{4})(?= )'```

Negative lookbehind and positive lookahead.

Because you didn't want the spaces.

Now...this gets the result...but.

I don't know how well it's going to hold up to more robust testing.

I don't know if this is good regex or crap regex.

But there's my go at it.

@tranquil nova

[cerulean eagle]

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