s.split() vs s.split(" ")

# split()  
- 공백 무시 


def solution(s):   
    s = s.split()
    for i in range(len(s)):
        s[i] = s[i][:1].upper() + s[i][1:].lower()
    return " ".join(s) 

solution(" AAaa AA    A")

# 'Aaaa Aa A'

# split(" ") 
- 공백도 care해준당


def solution(s):   
    s = s.split(" ")
    for i in range(len(s)):
        s[i] = s[i][:1].upper() + s[i][1:].lower()
    return " ".join(s) 

solution(" AAaa AA    A")

# ' Aaaa Aa    A'