Final answer:
To fix the "EOF when reading a line" error when entering weights, ensure the use of Python's input() function matches the expected number of weight inputs and that the weights list is displayed correctly.
Step-by-step explanation:
The error "EOF when reading a line" typically occurs when an input is expected but not provided, usually happening in situations where user interaction is required but the script is not running interactively, such as when being graded automatically. To resolve this, make sure your code is using a proper input mechanism for all four weights and there are no typos or errors. Here is a basic example of how the code might look:
weights = []
for i in range(1, 5):
weight_input = input(f'Enter weight {i}:')
weights.append(float(weight_input))
print('Weights:', weights)
Ensure that your code does not have any extra input calls and that it's formatted to match the expectations of the grading system. Verify that you are using Python's input() function correctly and each call should correspond to one weight being entered. The list weights should be properly displayed as per the lab's output requirements.