AttributeError: 'list' object has no attribute 'shape'

This error indicates that you are trying to access the "shape" attribute of a list object. However, the "shape" attribute is not a standard property of a list in Python. It is only available for NumPy arrays.

If you are working with a NumPy array, make sure that you are using the correct syntax to access its shape attribute:

import numpy as np

# create a 2D array
arr = np.array([[1, 2], [3, 4]])

print(arr.shape)  # output: (2, 2)

If you are not working with a NumPy array, you may need to use a different method to get the size or dimensions of your data structure. For example, you can use the `len()` function to get the length of a list:

my_list = [1, 2, 3, 4, 5]

print(len(my_list))  # output: 5