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

It seems to me, the larger, later problem is this. If your process is creating pairs and some pairs have a "None" key, then it will overwrite all the previous None pairs. Your dictionary will silently throw out values because you had duplicate None keys. No?