python – How to fix TypeError: len() of unsized object

python – How to fix TypeError: len() of unsized object

Use the arrays size attribute instead:

nv = v.size
nu = u.size

You also probably want to use numpy.fromstring to take and convert the input string into an array:

>>> v = np.fromstring(input(enter the elements of the vector separated by comma: ), dtype=int, sep=,)
enter the elements of the vector separated by comma: 1, 2, 3
>>> v
array([1, 2, 3])
>>> len(v)
3
>>> v.size
3

For me this error occurred when I had the following situation:

import numpy as np

arr = np.array([[1]])

arr_squeezed = arr.squeeze()
len(arr_squeezed)  # TypeError: len() of unsized object

For this to work properly, make sure that array youre squeezing contains more then one element.

python – How to fix TypeError: len() of unsized object