python错误和异常处理_python异常处理

raise [Exception [, args [, traceback]]]

def division():
    '''功能：分苹果'''
    print("\n===================== 分苹果了 =====================\n")
    apple = int(input("请输入苹果的个数："))                     # 输入苹果的个数
    children = int(input("请输入来了几个小朋友："))
    if apple < children:
        raise ValueError("苹果太少了，不够分...")
    result = apple // children                                   # 计算每人分几个苹果
    remain = apple - result * children                          # 计算余下几个苹果
    if remain > 0:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result,
              "个,剩下", remain, "个。")
    else:
        print(apple, "个苹果，平均分给", children, "个小朋友，每人分", result, "个。")
if __name__ == '__main__':
    try:                                                           # 捕获异常
        division()                                                 # 调用分苹果的函数
    except ZeroDivisionError:                                    # 处理异常
        print("\n出错了 ~_~ ——苹果不能被0个小朋友分！")
    except ValueError as e:
        print("\n出错了 ~_~ ——",e)

try:
    raise NameError('HiThere')
except NameError:
    print('An exception flew by!')
    raise