Hi, With a simple dict, the following happens:
>>> d = {
... 'a': 1,
... 'b': 2,
... 'a': 3
... }
>>> d
{'a': 3, 'b': 2}
... i.e. the value for the 'a' key gets overridden.
What I'd like to achieve is:
>>> d = {
... 'a': 1,
... 'b': 2,
... 'a': 3
... }
Error: The key 'a' already exists.
Is that possible, and if so, how?
Many thanks!
Kind regards,
Julien
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