Two variable dictionary comprehension
Deborah Swanson
python at deborahswanson.net
Sun Apr 2 22:34:49 EDT 2017
Ben Finney wrote, on April 02, 2017 6:38 PM
>
> "Deborah Swanson" <python at deborahswanson.net> writes:
>
> > It seems like this should be easy to rewrite as a dict
> comprehension:
> >
> > records_idx = {}
> > for idx, label in enumerate(records[0]):
> > records_idx[label] = idx
>
> How about this::
>
> records_idx = {
> label: idx
> for (idx, label) in enumerate(collection_of_labels)
> }
>
> You may have tripped on the ambiguity of the comma in its
> surrounding context. I always prefer to put parens around the
> items I intend to be comma-separated, to remove that ambiguity.
>
> --
> \ "[It's] best to confuse only one issue at a time."
> -Brian W. |
> `\ Kernighan, Dennis M. Ritchie, _The C programming
> language_, 1988 |
> _o__)
> |
> Ben Finney
That's a neat way to think about the problem. Me, I was guessing all the
way, and pleasantly surprised when the 3-statement concoction I came up
with worked.
Thanks Ben!
Deborah
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