‘NoneType’ object has no attribute ‘to_dict’

I’am quite new to python and I am developing a passport scanner with a RaspberryPi and the passport eye module. In the end it prints outs the outcome of the scanned image. However, I also want to …

The gradient (2d) search function returns None. What is the problem?

I have a function that should return a gradient. def numerical_derivative_2d(func, epsilon): def grad_func(x): grad_func = (func(x + np.array([epsilon, 0])) – func(x)) / epsilon, (func(x + …

Why “None Type” is returned while Selection Sort implementation in Python? [closed]

I’m trying to implement Selection Sort Algorithm in Python and for some reason Sorted Array is returned as None . Here’s the Code: #Selection Sort def selection_sort(array): for i in range(len(…

What is a ‘NoneType’ object?

I’m getting this error when I run my python script: TypeError: cannot concatenate ‘str’ and ‘NoneType’ objects I’m pretty sure the ‘str’ means string, but I dont know what a ‘NoneType’ object is. My …