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

jsonify does not support a dictionary with None key.

From Flask import jsonify

def json_():
    d = {None: 'None'}
    return jsonify(d)

This will throw an error:
TypeError: '<' not supported between instances of 'NoneType' and 'str'