https://programmers.co.kr/learn/courses/30/lessons/12918
def solution(s):
if s.isnumeric():
if len(s)==4 or len(s)==6:
return True
else:
return False
else:
return False
def alpha_string46(s):
return s.isdigit() and len(s) in (4, 6)
and
사용def alpha_string46(s):
try:
int(s)
except:
return False
return len(s) == 4 or len(s) == 6