9.4 自定义异常

class ShortInputError(Exception):
    # 自定义异常
    def __init__(self, length, atleast):
        self.length = length
        self.atleast = atleast
try:
    text = input('请输入密码:\n')
    if len(text) < 3:
        raise ShortInputError(len(text), 3)
except ShortInputError as result:
    print(f"输入的长度是{result.length}，长度至少应该是{result.atleast}")
else:
    print("成功")