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Jason Smith
8,668 PointsBummer: `good_numbers` seems to be missing or empty.
im not sure where i messed up, can you point me in the right direction?
import re
string = '1234567890'
good_numbers = re.findall(r'[0-4][^5-7][8-9]', string)
3 Answers
Steven Parker
231,248 PointsIt looks like you got a bit overly-specific, and each of your character classes represent a different character.
A regex of '[0-4][^5-7][8-9]' will only match 3 consecutive characters where the first one is a digit between 0 and 4 (inclusive), the second one is anything other than 5, 6, or 7, and the last one is either 8 or 9. And of course, there are no instances like that in the test string.
Try making a bit simpler, specify only the requirements, and for a single character.
Jason Smith
8,668 Pointsi was under the impression multiple sets meant multiple queries, can you give me an example of a similar one-set query?
Jason Smith
8,668 Pointsthanks for the hint! that was it
Steven Parker
231,248 PointsSteven Parker
231,248 PointsThe instructions say the "pattern matches anything in
stringexcept the numbers 5, 6, and 7.", so you really only want to use a single character class, and use it to only exclude those three digits. So you already have the right coding, but it's sandwiched between two other things you don't need.