try:pass
except Exception as ex:   pass

while True:num1 = raw_input('num1:')num2 = raw_input('num2:')try:num1 = int(num1)num2 = int(num2)result = num1 + num2except Exception as e:print('出现异常，信息如下：')print(e)

AssertionError: 断言语句失败
AttributeError: 属性引用或赋值失败
FloatingPointError: 浮点型运算失败
IOError:  I/O操作失败
ImportError: import语句不能找到要导入的模块，或者不能找到该模块特别请求的名称
IndentationError: 解析器遇到了一个由于错误的缩进而引发的语法错误
IndexError: 用来索引序列的证书超出了范围
KeyError: 用来索引映射的键不再映射中
keyboardInterrupt: 用户按了中断键(Ctrl+c,Ctrl+Break或Delete键)
MemoryError: 运算耗尽内存
NameError: 引用了一个不存在的变量名
NotImplementedError: 由抽象基类引发的异常，用于指示一个具体的子类必须覆盖一个方法
OSError: 由模块os中的函数引发的异常，用来指示平台相关的错误
OverflowError: 整数运算的结果太大导致溢出
SyntaxError: 语法错误
SystemError: python本身或某些扩展模块中的内部错误
TypeError：对某对象执行了不支持的操作
UnboundLocalError：引用未绑定值的本地变量
UnicodeError：在Unicode的字符串之间进行转换时发生的错误
ValueError：应用于某个对象的操作或函数，这个对象具有正确的类型，但确有不适当的值
WindowsError：模块os中的函数引发的异常，用来指示与WIndows相关的错误
ZeroDivisionError： 除数为0

ArithmeticError
AssertionError
AttributeError
BaseException
BufferError
BytesWarning
DeprecationWarning
EnvironmentError
EOFError
Exception
FloatingPointError
FutureWarning
GeneratorExit
ImportError
ImportWarning
IndentationError
IndexError
IOError
KeyboardInterrupt
KeyError
LookupError
MemoryError
NameError
NotImplementedError
OSError
OverflowError
PendingDeprecationWarning
ReferenceError
RuntimeError
RuntimeWarning
StandardError
StopIteration
SyntaxError
SyntaxWarning
SystemError
SystemExit
TabError
TypeError
UnboundLocalError
UnicodeDecodeError
UnicodeEncodeError
UnicodeError
UnicodeTranslateError
UnicodeWarning
UserWarning
ValueError
Warning
ZeroDivisionError

更多异常

dic = ["python", 'linux']
try:dic[10]
except IndexError as e:print(e)

dic = {'k1':'v1'}
try:dic['k20']
except KeyError as e:print(e)

# 未捕获到异常，程序直接报错s1 = 'hello'
try:int(s1)
except IndexError as e:print(e)

s1 = 'hello'
try:int(s1)
except IndexError as e:print(e)
except KeyError as e:print(e)
except ValueError as e:print(e)

s1 = 'hello'
try:int(s1)
except Exception as e:print(e)

s1 = 'hello'
try:int(s1)
except KeyError as e:print('键错误')
except IndexError as e:print('索引错误')
except Exception as e:print('错误')

try:# 主代码块pass
except KeyError as e:# 异常时，执行该块pass
else:# 主代码块执行完，执行该块pass
finally:# 无论异常与否，最终执行该块pass

try:raise Exception('错误了。。。')
except Exception as e:print(e)

class MyException(Exception):def __init__(self, msg):self.message = msgdef __str__(self):return self.messagetry:raise MyException('我的异常')
except WupeiqiException as e:print(e)

# assert 条件assert 1 == 1assert 1 == 2

class Foo(object):def __init__(self):self.name = 'python'def func(self):return 'func'obj = Foo()# #### 检查是否含有成员 ####
hasattr(obj, 'name')
hasattr(obj, 'func')# #### 获取成员 ####
getattr(obj, 'name')
getattr(obj, 'func')# #### 设置成员 ####
setattr(obj, 'age', 18)
setattr(obj, 'show', lambda num: num + 1)# #### 删除成员 ####
delattr(obj, 'name')
delattr(obj, 'func')

class Foo(object):def __init__(self):self.name = 'python'def func(self):return 'func'obj = Foo()# 访问字段
obj.name
# 执行方法
obj.func()

class Foo(object):def __init__(self):self.name = 'python'# 不允许使用 obj.name
obj = Foo()

class Foo(object):def __init__(self):self.name = 'python'def func(self):return 'func'# 不允许使用 obj.name
obj = Foo()print obj.__dict__['name']

class Foo(object):def __init__(self):self.name = 'python'def func(self):return 'func'# 不允许使用 obj.name
obj = Foo()print getattr(obj, 'name')

d、比较三种访问方式

• obj.name
• obj.__dict__['name']
• getattr(obj, 'name')

答：第一种和其他种比，...
      第二种和第三种比，...

#!/usr/bin/env python
#coding:utf-8
from wsgiref.simple_server import make_serverclass Handler(object):def index(self):return 'index'def news(self):return 'news'def RunServer(environ, start_response):start_response('200 OK', [('Content-Type', 'text/html')])url = environ['PATH_INFO']temp = url.split('/')[1]obj = Handler()is_exist = hasattr(obj, temp)if is_exist:func = getattr(obj, temp)ret = func()return retelse:return '404 not found'if __name__ == '__main__':httpd = make_server('', 8001, RunServer)print "Serving HTTP on port 8000..."httpd.serve_forever()

class Foo(object):staticField = "old boy"def __init__(self):self.name = 'wupeiqi'def func(self):return 'func'@staticmethoddef bar():return 'bar'print getattr(Foo, 'staticField')
print getattr(Foo, 'func')
print getattr(Foo, 'bar')

#!/usr/bin/env python
# -*- coding:utf-8 -*-def dev():return 'dev'

#!/usr/bin/env python
# -*- coding:utf-8 -*-"""
程序目录：home.pyindex.py当前文件：index.py
"""import home as obj#obj.dev()

func = getattr(obj, 'dev')
func() 

#!/usr/bin/env python
# -*- coding:utf-8 -*-def index():print("炫酷的主页面")

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# 反射：基于字符串的形式去对象(模块)中操作其成员getattr(),setattr(),hasattr(),delattr()
# 扩展：导入模块
#      import xxx
#      from xxx import ooo
#
#      obj = __import__("xxx")
#      obj = __import__("xxx." + ooo,fromlist=True)def run():while True:inp = input("请输入要访问的URL:")mo,fn = inp.split('/')obj = __import__(mo)if hasattr(obj,fn):func = getattr(obj,fn)func()else:print("网页不存在")run()

#!/usr/bin/env python
# -*- coding:utf-8 -*-def login():print("炫酷的登录页面")def logout():print("炫酷的退出页面")

#!/usr/bin/env python
# -*- coding:utf-8 -*-# 反射：基于字符串的形式去对象(模块)中操作其成员getattr(),setattr(),hasattr(),delattr()
# 扩展：导入模块
#      import xxx
#      from xxx import ooo
#
#      obj = __import__("xxx")
#      obj = __import__("xxx." + ooo,fromlist=True)def run():while True:inp = input("请输入要访问的URL:")mo,fn = inp.split('/')obj = __import__("lib." + mo,fromlist=True)if hasattr(obj,fn):func = getattr(obj,fn)func()else:print("网页不存在")run()

import importlibmodule = "lib.account"
func_name = "login"m = importlib.import_module(module)
func = getattr(m, func_name)
func()