Если "enterData = int...", то для str ошибка "invalid literal", как не допустить добавления строки и убрать ошибку "invalid literal"?

dataBase = [1,2,3]
print("\nActual Data {}".format(dataBase))
print("\nIf you wont input a new data write here, please")
enterData = int(input("New Data >>> "))
# We have data
if enterData in dataBase:
    print("We have this data")
# We don't have data
elif enterData not in dataBase:
    dataBase.append(enterData)
    print("New data has been write: {}".format(dataBase))
# "Try again..." if str
else:
    print("Try again...")