zybook 8.18.1: Ch 8 Warm up: People's weights

Zybook lab activity 8.18.1 having issues submitting on main.py (python)
error:
Exited with return code 1.
Traceback (most recent call last):
File "main.py", line 11, in
index = int(input('Enter a list index (1 - 4):\n'))
EOFError: EOF when reading a line

my code:
'weights = [float(input('Enter weight 1:\n')),
float(input('Enter weight 2:\n')),
float(input('Enter weight 3:\n')),
float(input('Enter weight 4:\n'))]
print("Weights:", weights)

print('\nAverage weight: %.2f' % (sum(weights) / len(weights)))

print('Max weight: %.2f' % (max(weights)))

index = int(input('Enter a list index (1 - 4):\n'))
print('Weight in pounds: %.2f' % weights[index - 1])
print('Weight in kilograms: %.2f' % (weights[index - 1] / 2.2))

print('\nSorted list:', sorted(weights))`