2016-04-03 10:54 GMT+03:00 lith <minilith@gmail.com>:
>> > I would like to make values become keys in this dict, is it possible
>> > in one simple command ?
>> However, with a dirty hack, it becomes possible to do this with a almost-oneliner:
>
> The problem with these oneliners is that values can be empty strings (keys must not be empty) and that there may be duplicate values that would have to be reconciled. You'd have to deal with these cases somehow.
Values can be non-strings as well. Such tricks are usually used in
plugins where you e.g. have mappings like "escape sequence to escaped
character" for decoder and "escaped character to escape sequence" for
encoder or something like this: dictionaries are read-only, written
just above and you know for sure they do not contain something
unexpected, so such cases do not need to be handled at all. You see
exactly this type of task in example shown by OP.
>
> Regards
>
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