why i am not able to get two integer separated by a space using single input function using python

Question

number_of_testcases = input()
number_of_girls = int(input().split())
i=0
a = []
b = []
while i < number_of_girls:
    v,n = input().split()
    a.append(v)
    b.append(n)
    i = i +1 

I am trying to get the first line of each test case contains an integer n and it is followed by n lines, each containing two space-separated integers.

The error I am getting is

v,n = input().split()
EOFError: EOF when reading a line'

Can someone please explain? I am new to python and it is hard to understand.

Answer 1

Guessing from your error message: you seem to have not enough data to parse available. But your code should give you an even earlier error:

Because int() can operate on a string containing a single number - not on a list that contains multiple strings.

Use

number_of_girls = list(map(int,input().split()))

instead - you'll get a list of ints or it crashes if you input non-numbers.

---

Generally to do what you aim for I would do:

data = []
cases = int(input().strip())  # number of cases in a single line
for _ in cases:
   girls = int(input().strip())  # number of girs per test case given in single line

   case = [[],[]]
   for _ in range(girls):
       a,b = map(int,input().strip().split()) # 2 numbers space seperated in single line
       case[0].append(a)
       case[1].append(b)

   data.append(case)

to get all data for all test cases.