python之munch使用

一、包安装

1. 检查包是否已经安装

[bonnie@gzqc249-null-8-nick ~]$ python
Python 2.6.6 (r266:84292, Aug 18 2016, 15:13:37) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import munch
Traceback (most recent call last):
  File "", line 1, in 
ImportError: No module named munch
>>> 

说明munch包未安装

2. 安装munch包

[root@VM_249_182_centos ~]# pip install munch
Looking in indexes: http://mirrors.tencentyun.com/pypi/simple
Collecting munch
  Downloading http://mirrors.tencentyun.com/pypi/packages/68/f4/260ec98ea840757a0da09e0ed8135333d59b8dfebe9752a365b04857660a/munch-2.3.2.tar.gz
Requirement already satisfied: six in ./.pyenv/versions/3.7.3/lib/python3.7/site-packages (from munch) (1.12.0)
Installing collected packages: munch
  Running setup.py install for munch ... done
Successfully installed munch-2.3.2

3. 验证安装结果

[root@VM_249_182_centos ~]# python
Python 3.7.3 (default, Apr 10 2019, 16:42:27) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from munch import *
>>> b = Munch()

二、方法使用

暂时增加初步使用的日志。
对于munch的使用和性能分析，可参考https://zhuanlan.zhihu.com/p/36210263

>>> from munch import *
>>> b = Munch()
>>> b.hellow='world'
>>> b['hellow']
'world'
>>> b.hello='world'
>>> b['hello']
'world'
>>> b['hello'] += '!'
>>> b['hello']
'world!'
>>> b.foo = Munch(lol=True)
>>> b.foo.lol
True
>>> b.foo is b['foo']
True
>>> b
Munch({'hellow': 'world', 'hello': 'world!', 'foo': Munch({'lol': True})})
>>> b.keys()
dict_keys(['hellow', 'hello', 'foo'])
>>> b.update({'ponies':'are pretty!'}, hello = 43})
  File "", line 1
    b.update({'ponies':'are pretty!'}, hello = 43})
                                                 ^
SyntaxError: invalid syntax
>>> b.update({'ponies':'are pretty!'}, hello = 43)
>>> b
Munch({'hellow': 'world', 'hello': 43, 'foo': Munch({'lol': True}), 'ponies': 'are pretty!'})
>>> [(k, b[k]) for k in b]
[('hellow', 'world'), ('hello', 43), ('foo', Munch({'lol': True})), ('ponies', 'are pretty!')]
>>> import json
>>> json.dumps(b)
'{"hellow": "world", "hello": 43, "foo": {"lol": true}, "ponies": "are pretty!"}'
>>> undefined = object()
>>> b = DefaultMunch(undefined, {'hello':'world'})
>>> b
DefaultMunch(