Getting the minimum from a list.

[Seo Sanghyeon]

anson wrote:
> (syntax error code)

I assume it was:
----
data = [
  [("file", 101, "function f"), 456, 80000],
  [("file2", 102, "function"), 321, 90000]
]
----

This works:

----
def decorate(x):
  return x[1], x
def undecorate(x):
  return x[1]

>>> undecorate(min(map(decorate, data)))
[('file2', 102, 'function'), 321, 90000]

>>> data = map(decorate, data)
>>> data.sort()
>>> data = map(undecorate, data)
>>> data
[[('file2', 102, 'function'), 321, 90000], [('file', 101, 'function
f'), 456, 80000]]
----

Basic idea is, let decorate() to return tuple of keys that you want to
use for sorting and original record, and undecorate() to get rid of
keys. You can make decorate() as complex as you want.

Ah, and this uses the fact that tuples in Python are compared in
order.

-- Seo Sanghyeon