Python sets the key value of a key by changing its link

Question

I wonder how to do something like this in python:

d = {'a': 3}
a_value_ref = d['a']
a_value_ref = 6
assert d['a'] == 6

I want to first compute a reference to a specific value in a layered dict, and then change it using this mechanism. Is it possible? Easy to use C / C ++. Thank you for your help.

Answer 1

This is not how Python works, workarounds are not good solutions. I changed the way dict keys are accessed, and now I am updating the values ​​with the syntax dict[key] = value.

Answer 2

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d = {'a': [3]}
a_value_ref = d['a']
a_value_ref[0] = 6
assert d['a'] == [6]