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Pythonの割り算でエラーメッセージの出方が微妙に違う

Last updated at Posted at 2023-05-29

本記事の背景

あるサイトの挑戦問題において、0割エラーにおいて出力されるエラーメッセージに微妙な違いがある為、本メモを残す

Pythonの割り算

まずは正解のソースコードを以下に示す

n = int(input())

for n1 in range(0,n):
    a,b = map(str, input().split())
    try:
        print(int(a)//int(b))
    except (ZeroDivisionError, ValueError) as e:
        print("Error Code:", e)

入力値

3
3 0
3 $
3 1

出力結果

Error Code: integer division or modulo by zero
Error Code: invalid literal for int() with base 10: '$'
3

引っかかったポイント

try:
    print(int(a)/int(b))
except (ZeroDivisionError, ValueError) as e:
    print("Error Code:", e)

上記のソースコードだとエラーメッセージが以下になる

Error Code: integer division by zero
Error Code: invalid literal for int() with base 10: '$'
3

「integer division or modulo by zero」と「integer division by zero」という微妙に違っていた。
実は、Pythonで割り算をする場合
a/b → 「商+余り」を含めて小数で出力する
a//b → 「商」のみ出力する
以上を押さえておくと良いかと思います。

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