Traceback most recent call last File dPycharmpracticeshiying17_1py line 4 in module maxLength = lenmaxlines key=lenValueError max arg is an empty sequence

This error occurs when the max() function is called with an empty sequence. In the given code, the max() function is called with the lines sequence, and the key parameter is set to len to compare the length of the lines.

The error message indicates that the lines sequence is empty, meaning it does not contain any elements. In this case, there is no maximum value to determine, and hence the max() function raises a ValueError.

To fix this issue, you need to ensure that the lines sequence is not empty before calling the max() function. You can check if the sequence is empty using an if statement and handle the empty case separately