Multiline user input with list comprehension in Py

Question

Total newb to Python here. I'm working on CodeAbbey's problems using Python 3, and I'd like help to make the code for user input shorter.

Let's say I want to get this input from the user:

3
2 3
4 5
6 7

First line is number of cases, and each of the following lines are the cases themselves with 2 parameters. I've figured out to do it in this way so far:

N=int(input('How many cases will you calculate?\n'))
print('Input parameters separated by spaces:')
entr = [list(int(x) for x in input().split()) for i in range(N)]

The thing is I'd rather to ask all the input in the list comprehension, and then assign N=entr[0]. But how do I get the list comprehension to break the input into lines without using range(N)?

I tried:

entr = [list(int(x) for x in input().split()) for x in input()]

but it doesn't work.

Answer 1

I don't see the benefit of doing this in a list comprehension, but here is a solution that allows all data to be copy-pasted in:

entr = [list(int(x) for x in input().split())
        for i in range(int(input()))]
N = len(entr)

Your solution was pretty close. The outer iteration just needed to be given something to iterate on (using range()) rather than a single number.