python 流行库、库的基本用法

进入github，输入python 点击see topic 进入python流行的库  链接 https://github.com/topics/python

1、QuantLib 金融衍生品数据库

2、schedule定时任务 https://github.com/dbader/schedule

3、Tenacity。Python重试从此无比简单  https://github.com/jd/tenacity/releases?after=v1.2.2

4、yagmail 发邮件的库 https://github.com/kootenpv/yagmail

5、Tornado web server  Tornadois a Python web framework andasynchronous networking library, originally developed atFriendFeed. By using non-blocking network I/O, Tornadocan scale to tens of thousands of open connections, making it ideal forlong polling,WebSockets, and otherapplications that require a long-lived connection to each user.

tornado是一个Python Web框架的异步网络库，最初是在FriendFeed。通过使用非阻塞的网络I/O，tornadocan规模对打开的连接数以万计，使其成为理想的长轮询，WebSockets，和其他应用程序需要一个长连接到每个用户。  https://github.com/tornadoweb/tornado

6、

库的使用

3、defaultdict库：python中defaultdict方法的使用

https://blog.csdn.net/real_ray/article/details/17919289

2、abc模块  以后有需要再学习

资料：http://blog.csdn.net/taiyangdao/article/details/78199623

https://docs.python.org/3/library/abc.html

http://blog.csdn.net/grey_csdn/article/details/77110667

http://blog.csdn.net/qijiqiguai/article/details/77269839

1、Munch库

import munch
b=Munch()
Traceback (most recent call last):
  File "D:\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2862, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-7-fa393e434470>", line 1, in <module>
    b=Munch()
NameError: name 'Munch' is not defined
from munch import *
b=Munch()
b.hello='world'
b['hello']
Out[11]: 'world'
b['hello']+='!'
b.hello
Out[13]: 'world!'
b.foo=Munch(lol=True)
b.foo.lol
Out[15]: True
b.foo is b['foo']
Out[16]: True
b
Out[17]: Munch({'hello': 'world!', 'foo': Munch({'lol': True})})
b['yang']='qie'
b
Out[19]: Munch({'hello': 'world!', 'foo': Munch({'lol': True}), 'yang': 'qie'})
b.keys()
Out[20]: dict_keys(['hello', 'foo', 'yang'])
b.update({'ponies':'are pretty!'},hello=43)
b
Out[22]: Munch({'hello': 43, 'foo': Munch({'lol': True}), 'yang': 'qie', 'ponies': 'are pretty!'})
[(k,b[k]) for k in b]
Out[23]:
[('hello', 43),
 ('foo', Munch({'lol': True})),
 ('yang', 'qie'),
 ('ponies', 'are pretty!')]
'The {knights} who say {ni}'.format(**Munch(knights='lolcats',ni='can haz'))
Out[24]: 'The lolcats who say can haz'
b=Munch(foo=Munch(lol=True),hello=42,ponies='are pretty!')
b
Out[26]: Munch({'foo': Munch({'lol': True}), 'hello': 42, 'ponies': 'are pretty!'})
import json
json.dumps(b)
Out[28]: '{"foo": {"lol": true}, "hello": 42, "ponies": "are pretty!"}'
undefined=object()
b=DefaultMunch(undefined,{'hello':'world'})
b
Out[32]: DefaultMunch(<object object at 0x00000167253C5430>, {'hello': 'world'})
b()
Traceback (most recent call last):
  File "D:\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2862, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-33-9c619ddbd09b>", line 1, in <module>
    b()
TypeError: 'DefaultMunch' object is not callable
b.hello
Out[34]: 'world'
b.foo
Out[35]: <object at 0x167253c5430>
b.foo()
Traceback (most recent call last):
  File "D:\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2862, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-36-e1521d9f21b2>", line 1, in <module>
    b.foo()
TypeError: 'object' object is not callable
b.foo is undefined
Out[37]: True
undefined=object()
b=DefaultMunch.fromDict({'recursively':{'nested':'value'}},undefined)
b.recursively
Out[40]: DefaultMunch(<object object at 0x00000167253C5420>, {'nested': 'value'})
b.recursively.nested
Out[41]: 'value'
b.recursively.foo
Out[42]: <object at 0x167253c5420>