Problem in reading till EOF in python

i have a python code which should read in 2 integers from standard input till user presses Ctrl+D (i.e EOF) and do some processing .I tried the following code : n,k=map(int,[a for a in sys.stdin.read().split()]) Here , when i enter two integers the programme accepts it and when i press Ctrl+D it shows the correct output , like: 6 3 but when i put in 2 pairs in intergers like: 6 3 12 2 and then press Ctrl+D then instead of the desired result i get error that: [i]ValueError: Too many values to upack[/i] So how do i correct the code for it to work properly? I intend开发者_如何学运维 to have the shortest possible code for that Thanks.

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>>> x=map(int,[a for a in sys.stdin.read().split()])
2 3 4 5
>>> x
[2, 3, 4, 5]

and work against the list; this so you will accept a variable number of ints if required to do so

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The problem is not in how you read from stdin. Entering 6 3 essentially makes your code equivalent to

n, k = [6, 3]

which will work fine. Entering 6 3 12 2 though will result in

n, k = [6, 3, 12, 2]

which does not work, since you try to unpack a sequence of four values to only two targets. If you want to ignore everything beyond the first two numbers, try

n, k = [int(a) for a in sys.stdin.read().split()][:2]

If you want to iterate through the numbers read from stdin in pairs, you can use

numbers = (int(a) for a in sys.stdin.read().split())
for n, k in zip(numbers, numbers):
    # whatever