find words of length 4 using regular expression

Question

I am trying to find words in regular expression with length 4

I am trying this but I am getting an empty list:

#words that have length of 4
s = inpu         


        

Answer 1

No need for a (possibly) complicated regex, you can just use a list comprehension:

>>> s = "here we are having fun these days"
>>> [word for word in s.split() if len(word) == 4 and word.isalpha()]
['here', 'days']
>>>