Find the minimum length of word in a string

In order to find the shortest word in a string e have to split the word and count the length of each word this can be achieved in the following two ways:

In primitive way we do the following type of coding:

def find_short(s):
    minlen=len(s.split()[0])
    length=0
    for i in s.split():
        length=len(i)
        if(length<minlen):
            minlen=length
    return minlen

return=find_short('this is a hello world')
print(return)

#Now a days we do the same thing using :

def find_short(s):
    return min(len(x) for x in s.split())