regex2 LeetCode 819. Most Common Word Problem: Given a paragraph and a list of banned words, return the most frequent word that is not in the list of banned words. It is guaranteed there is at least one word that isn't banned, and that the answer is unique. Words in the list of banned words are given in lowercase, and free of punctuation. Words in the paragraph are not case sensitive. The answer is in lowercase. Example: Input: para.. 2020. 8. 18. Regular expression operation (re.sub) re.sub(pattern, repl, string, count=0, flags=0) s = re.sub('[^a-z0-9]','',s) #[a-z0-9] --> matching any lower case letter a to z and digit of 0-9 ''' This will replace any special characters in 's' string with non-space blank characters. ''' -Example- s = 'abc#@%921' s = re.sub('[^a-z0-9]', '', s) s --> 'abc921' https://docs.python.org/3/library/re.html#re.sub re — Regular expression operations .. 2020. 8. 16. 이전 1 다음