[인프런] 3.탐색&시뮬레이션(string, 1차원, 2차원 리스트 탐색 ) 2.숫자만추출

2. 숫자만 추출

import sys
sys.stdin=open("pythonalgorithm/섹션 3/2. 숫자만 추출/in1.txt","rt")
a=input()
res=cnt=0
for i in a:
    if i.isdecimal():
        res=res*10+int(i)
print(res)
for i in range(1,res+1):
    if res%i==0:
        cnt+=1
print(cnt)

• isdecimal()

Definition and Usage

The isdecimal() method returns True if all the characters are decimals (0-9).

This method is used on unicode objects.

출처 : https://www.w3schools.com/python/ref_string_isdecimal.asp#:~:text=The%20isdecimal()%20method%20returns,is%20used%20on%20unicode%20objects. 

Python String isdecimal() Method

• 약수의 개수를 구할 때 for 범위는 range(1, 해당값+1)