detect key conflict in a JSON file

[Jabba Laci]

> The real answer here is that JSON is probably not the best choice for
> large files that get hand-edited.  For data that you intend to hand-edit
> a lot, YAML might be a better choice.
>
>> Currently the value of the second key silently overwrites the value of
>> the first.

Thanks but how would it be different with YAML? Can YAML check duplicate keys?

How to process (read) YAML files in Python? Can you give me some hints
how to get started? All I need is read it in and create a dictionary
of it.

Thanks,

Laszlo