What is the idiomatic way of doing...

[HP Wei]

Hi
  Three newbie questions:

Suppose I have a file:
% test.txt content
{"label1", "v1"}.
{"label2", "v2"}.

In erl, file:consult(test.txt) will give me a list of
tuples  [{"label1","v1"},{"label2","v2"}].

Suppose test.txt is very big and it is better to extract one tuple at a
time to do something.
(1) what is the erlang-way of doing this ???

---------------------------------------
Suppose I have this file:
% test1.txt content
label1    v1
label2    v2

(2) Is there an idiomatic way of getting the list of tuples as in the
    previous case ??

(3) What about getting one tuple at a time ???

THanks,
HP