bidict模块通过一对一映射结构的处理，利用python的切片功能。
https://pypi.python.org/pypi/bidict
模块提供三个类来处理一对一映射类型的一些操作
'bidict', 'inverted', 'namedbidict'
>>>
import bidict
>>>
dir(bidict)
['MutableMapping',
'_LEGALNAMEPAT',
'_LEGALNAMERE',
'__builtins__',
'__doc__',
'__file__',
'__name__',
'__package__',
'bidict',
'inverted',
'namedbidict',
're',
'wraps']
bidict类：用法
>>>
from bidict
import bidict
>>> D=bidict({
'a':
'b'})
>>> D[
'a']
'b'
>>> D[:
'b']
'a'
>>> ~D
#反转字典
bidict({
'b':
'a'})
>>> dict(D)
#转为普通字典
{
'a':
'b'}
>>> D[
'c']=
'c' #添加元素，普通字典的方法都可以用
>>>
D
bidict({'a':
'b',
'c':
'c'})
inverted类，反转字典的键值
>>> seq = [(1,
'one'), (2,
'two'), (3,
'three')]
>>>
list(inverted(seq))
[('one', 1), (
'two', 2), (
'three', 3)]
namedbidict(mapname, fwdname, invname)：用法
>>> CoupleMap = namedbidict(
'CoupleMap',
'husbands',
'wives')
>>> famous = CoupleMap({
'bill':
'hillary'})
>>> famous.husbands[
'bill']
'hillary'
>>> famous.wives[
'hillary']
'bill'
>>> famous.husbands[
'barack'] =
'michelle'
>>>
del famous.wives[
'hillary']
>>>
famous
CoupleMap({'barack':
'michelle'})
转载于:https://www.cnblogs.com/luobuda/p/bidict.html
相关资源：Python中使用bidict模块双向字典结构的奇技淫巧
