EOFError:EOF when reading a line

count = 1

inNumber = eval(input("Enter score class mate:　"))

maxData = inNumber

while inNumber != 0:

    inNumber = eval(input("Enter score class mate:　"))

    if inNumber > maxData:

        maxData = inNumber

    count += 1

print(maxData)

print(f"class is {count}")

python app.py  <input.txt >output.txt

EOFError:EOF when reading a line