Data structure question

Tim Chase python.list at
Mon Nov 18 03:23:09 CET 2013

On 2013-11-18 02:03, Joseph L. Casale wrote:
> I have a need for a script to hold several tuples with three
> values, two text strings and a lambda. I need to index the tuple
> based on either of the two strings. Normally a database would be
> ideal but for a self-contained script that's a bit much.
> Before I re-invent the wheel, are there any built-in structures
> that allow for this type of use case?

It would help to know how you plan to use it.  I *think* what you're
describing is something like

  data = [
    ("one",   "two",   lambda: "12"),
    ("three", "four",  lambda: "34"),
    ("five",  "six",   lambda: "56"),
    ("seven", "eight", lambda: "78"),
  mapping = dict(
    (k, t)
    for t in data
    for k in t[:2]

  for test in (
    a, b, fn = mapping[test]
    print("%s: %r, %r, %r" % (test, a, b, fn()))


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