How to catch any words in TfidfVectorizer by token_pattern

I'd like to catch any words separated by just space in TfidfVectorizer, even if the words like "0" "a" "x" "0?0" and so on. I wrote the below code for this purpose.

However, maybe, this code doesn't work well.

vectorizer = TfidfVectorizer(smooth_idf = False, token_pattern=r"[^ ]+")

P.S.

I could get a right pattern matching by using '\b' . Thanks a lot.

You may be looking for word boundaries:

\b\S+\b

Explanation:

• \b looks for a word boundary, in the first instance of usage it will look for the start of a word (first words after a newline or anything after a space (or type of whitespace))
• \S+ matches non whitespace characters at least once (the word you are looking for)
• Second \b matches end of word matched

Usage:

For string: Greetings from Spain it'd match Greetings , from and Spain