#第三周 周一 异常
a=(2,3)
try:
print(a[4])
except IndexError as o:
print(“出现错误啦”,o)
print(‘程序到这里啦’)
a=[23,34]
try:
print(a[3])
except IndexError as p:
print(‘错啦’,p)
print(‘到这儿啦’)
class A():
pass
try:
print(A.x)
except AttributeError as o:
print(o)
zd={‘name’:‘sd’,‘age’:34}
try:
print(zd[‘address’])
except KeyError as p:
print§
a=[1,2,3,4,5,56,6]
b=iter(a)
try:
while True:
print(next(b))
except StopIteration as o:
print(o)
a=[2,3,4,32]
try:
print(a[34])#一旦出现异常 立即被expect捕捉 下面的代码不再运行 所以只报一个错
print(a[2]/0)
except (ZeroDivisionError,IndexError) as p:
print§
else:
print(‘我没错’)
a=[1,2]
try:
print(a[2])
print(‘x’)
print(2/0)
except:
print(2)
else:
print(3)
finally:
print(‘饭还是要吃’)
try:
f=open(‘a.txt’,‘r’)
f.write(‘asf’)
except:
print(2)
finally:
print(‘在这’)
f.close()
with open(‘z.txt’,‘r’) as f:
x=f.read()
print(x)
a=10
raise IndexError(‘错啦’) #主动报错
print(a)
a=10
try:
raise IndexError(‘错啦’)
print(‘243’)
except IndexError as f:
print(f)
class MyError(Exception):
def init(self,msg):
self.msg=msg
def str(self):
return str(self.msg+‘五星级异常’)
try:
raise MyError(‘我其实没有错，我是’)
except MyError as e:
print(e)
class Student():
def init(self,name,age,sex,score):
self.name=name
self.age=age
self.sex=sex
self.score=score
zs=Student(‘zs’,19,‘男’,99)
print(dir(zs))#dir 显示文件列表
print(zs.name,zs.age,zs.sex,zs.score)
class People():
address=‘朝阳区’
def init(self,name):
self.name=name
zs=People(‘小红’)
print(zs.name,zs.address)
zs.address=‘海淀区’
print(zs.name,zs.address)
#del zs.address
delattr(zs,‘address’)
print(zs.name,zs.address)
class A():
def hehe(self):
print(self.name)
class B(A):
def init(self,name):
self.name=name
zs=B(‘张三’)
zs.hehe()
class A():
def init(self,name):
self.name=name
def haha():
print(‘你好’)
a=A(‘张三’)
a.hh=haha
a.hh()
class A():
money=100000000000000
def init(self,name):
self.name=name
@classmethod
def ClsM(cls):
print(cls.money)
print(A.money)
A.ClsM()
a=A(‘小红’)
a.ClsM()
print((isinstance(a,A)))
#单例模式
class A():
def new(cls, *args, **kwargs):
if not hasattr(A,‘xiaogou’):
cls.xiaogou=object.new(cls)
return cls.xiaogou
def init(self,name):
self.name=name
a=A(‘呵呵’)
b=A(‘嘿嘿’)
c=A(‘哈哈’)
print(a)
print(b)
print©
print(abc)
print(a is b is c)
import os
mlm=input(‘请输入’)
a=mlm.split(’\’)
p=os.getcwd()
for i in a:
p=p+’\’+i
p=os.path.join(p,i)
if not os.path.exists§:
os.mkdir(p,0o777)