How to solve "TypeError: 'NoneType' object is not subscriptable" error in Python?

 The error message "TypeError: 'NoneType' object is not subscriptable" occurs when you are trying to use the subscript operator (i.e., []) on a NoneType object. In Python, None is a special value that represents the absence of a value. This error typically occurs when you try to access an attribute or index a variable that is None.

Here's an example of code that might generate this error:

my_list = None
print(my_list[0])

In this example, my_list is assigned the value None, which means it has no value. When we try to access my_list[0], we are trying to access the first element of the list, but because my_list is None, we get the "TypeError: 'NoneType' object is not subscriptable" error.

To fix this error, you need to make sure that the variable you are trying to access or index is not None. You can do this by checking if the variable is None before trying to access it. For example:

my_list = [1, 2, 3]
if my_list is not None:
    print(my_list[0])

In this example, we first check if my_list is not None before trying to access its first element. This prevents the "TypeError: 'NoneType' object is not subscriptable" error.