Helmut Jarausch wrote:
> Hi,
>
> I'm looking for an elegant solution of the following tiny but common
> problem.
>
> I have a list of tuples (Unique_ID,Date) both of which are strings.
> I want to delete the tuple (element) with a given Unique_ID, but
> I don't known the corresponding Date.
>
> My straight forward solution is a bit lengthy, e.g.
>
> L=[("a","070501"),("b","080115"),("c","071231")]
> pos=-1
> found=-1
> for (Key,Date) in L :
> pos+= 1
> if Key == "b" :
> found= pos
> break
>
> if found >= 0 :
> del L[found]
>
> print L
>
> Most probably there are much more elegant solutions.
> Unfortunately, the index-list-method doesn't take an
> additional function argument for the comparisons.
>
> Many thanks for your hints,
Several solutions:
- use a different datastructure, as others suggested
- use a database. SQLite for example.
- replace the list in-place like this:
L[:] = [(k, d) for k, d in L if k != "b"]
Diez
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