1.异常

1.1.异常捕捉

try-except
py3异常信息捕捉用as e

try:
    print("this is a try except demo")
    open("noexist.txt",'r')
except IOError as e:
    print("we find a error",e)
    pass

1.2.捕捉多个异常

try:
    print("this is a try except demo")
    print(num)
    open("noexist.txt",'r')
except (IOError,NameError) as e:
    print("we find a error",e)
    pass

1.3.finally

不管有没有捕捉到异常，执行finally

1.4.else

没有捕捉到异常，执行else

try:
    num = 100
    print(num)
except NameError as e:
        print('产生错误了:%s'%e)
else:
    print('没有捕获到异常，真高兴')
finally:
    print('我一定会执行的哦')

1.5.抛出异常

raise

2.模块

类似java的引包

2.1 import

import 模块

from 模块 import 函数 ： 导入模块中的 某个函数

2.2 模块发布

1.编写setup.py,py_modules需指明所需包含的py文件

from distutils.core import setup

setup(name="xwp", version="1.0", description="xwp's module", author="xingwenpeng", py_modules=['suba.aa', 'suba.bb', 'subb.cc', 'subb.dd'])

2.构建模块

python setup.py build

3.生成发布压缩包

python setup.py sdist

2.3 模块的安装和使用

python setup.py install

from 模块名 import 模块名或者*