SymbolType在Python中有什么用途?

这是你的答案 SymbolType 向Python添加符号的包。那些用Lisp/Scheme做过任何有用工作的人能告诉我如何在Python中利用这种类型吗?

$ sudo easy_install SymbolType
$ ipython

很遗憾,不能使用符号将值作为Kwarg传递:

In [7]: X = s('X', __name__)
In [9]: a = {X: 10}
In [12]: Y = s('Y', __name__)
In [13]: a.update({Y: 20})
In [14]: a
Out[14]: {X: 10, Y: 20}

In [15]: for (k, v) in a.items():
   ....:     print k, v

Y 20
X 10

In [16]: def z(X=0,Y=1):
   ....:     print X, Y
   ....:     

In [17]: z(**a)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)

...<ipython console> in <module>()

TypeError: z() keywords must be strings