Using the following approach I am able to create a dictionary of values:
{ p.id : {'total': p.total} for p in p_list}
This results in {34:{'total':334}, 53:{'total: 123} ... }
I would also like to list an index from the list so that I know which position p.id
was in. I made a list like this:
c_list = [x for x in range(len(p_list))]
And then tried to see how c
could also be listed as part of the result. I thought I needed something like this:
{ (p,c) for p in p_list for c in c_list}
but when I tried to implement it, I could not get c
to be a value in the dictionary:
{ (p.id, c : {'total': p.total, 'position': c}) for p in p_list for c in c_list}
Use enumerate
to get index as well as the item from the iterable:
{ (p.id, ind) : {'id': p.id, 'position': ind} for ind, p in enumerate(p_list)}
Update:
{ p.id : {'id': p.id, 'position': ind} for ind, p in enumerate(p_list)}
Help on enumerate
:
>>> print enumerate.__doc__
enumerate(iterable[, start]) -> iterator for index, value of iterable
Return an enumerate object. iterable must be another object that supports
iteration. The enumerate object yields pairs containing a count (from
start, which defaults to zero) and a value yielded by the iterable argument.
enumerate is useful for obtaining an indexed list:
(0, seq[0]), (1, seq[1]), (2, seq[2]), ...
Try using enumerate
. It's a generator function that returns tuples of the form: (i, iterable[i]).
{ p.id : {'id': p.id, 'position': i} for i, p in enumerate(p_list)}
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