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Python Regular Expressions in Python Introduction to Regular Expressions Negated Numbers

negated numbers

dont quite understand what the task is asking me to do

import re

string = '1234567890'

1 Answer

Jeff Muday
Jeff Muday
Treehouse Moderator 27,586 Points

The challenge is looking for an application of regular expression re.findall() that will "recognize" numbers in a string but will exclude anything that contains 5, 6, or 7. You have to figure out what the regular expression might be.

Your challenge is to write a regular expression and fill in SomeRegularExpression (below)

import re

string = '1234567890'

good_numbers = re.findall(SomeRegularExpression, string)