异常处理

异常处理

 

 

# a[4]
# try:
#     '1'+ '2'
#     2 / 1
# except TypeError as e:
#     print(e)
#     print('出错了')
# except ZeroDivisionError as e:
#     print('除数不能为0')
# except IndexError:
#     print('下标错误')
# except KeyError:
#     print('找不到字典的key')
# except FileNotFoundError:
#     print('文件打不开')
# except Exception as e:
#     print('出异常了',e)
# else:
#     print('没有出异常')
# finally:
#     print('aaa')


# f = open('xxx','w')
# try:
#     f.write()
# except:
#     print('走这块')
# else:
#     print('xxx')
# finally:
#     f.close()

import traceback

def is_price(s):
    try:
        f = float(s)
    except Exception as e:
        # traceback.print_exc()
        print('zijijiade .....',traceback.format_exc())
        return False
    else:
        if f>0:
            return True

is_price('sdgsdf')
#调用堆栈信息

 

 

 

 

 

 

money = 1000
num = input('plese enter a num:')
try:
    num = float(num)
    res = money/num
except Exception as e: #出现异常了，就走except下面的代码
# except ValueError,e: #python2
    print('出现异常了')
    print('你输入的价格不合法。。')
    print(e)
else:#没有出现异常
    money-=num
    print(num)
    print('你的余额是%s'%money)
finally:
    print('我是finally')

class QqGroup:
    cookie = {'cookie':'xx'}
    def get_all_gorup(self):
        return {'xxx':2342343,'xxx':2323}
    def save_mongo(self,data):
        pass
    def get_group_info(self,num):
        return {''}
    def down_pic(self,num):
        pass
    def main(self):#入
        pass