Is it reasonable to use None as a dictionary key in Python?

Question

None seems to work as a dictionary key, but I am wondering if that will just lead to trouble later. For example, this works:

>>> x={\'a\':1, \'b\':2, N         


        

Answer 1

Funny though, even this works :

d = {None: 'None'}

In [10]: None in d
Out[10]: True