如何編寫python來查找數據庫是否有相同的數據

#!/usr/bin/env python import sys str = True while（str）:dig = int（input））if dig 100:print‘please input mun between 0 ~ 100‘elif dig = 90:print‘A‘elif dig = 80:print‘B‘elif dig = 70:print‘C‘elif dig = 60:print...