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[Solved] Python Math – TypeError: ‘NoneType’ object is not subscriptable

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error Python Math – TypeError: ‘NoneType’ object is not subscriptable in python. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How Python Math – TypeError: ‘NoneType’ object is not subscriptable Error Occurs?

Today I get the following error Python Math – TypeError: ‘NoneType’ object is not subscriptable in python.

How To Solve Python Math – TypeError: ‘NoneType’ object is not subscriptable Error ?

  1. How To Solve Python Math – TypeError: 'NoneType' object is not subscriptable Error ?

    To Solve Python Math – TypeError: 'NoneType' object is not subscriptable Error The .sort() method is in-place, and returns None. If you want something not in-place, which returns a value, you could use

  2. Python Math – TypeError: 'NoneType' object is not subscriptable

    To Solve Python Math – TypeError: 'NoneType' object is not subscriptable Error The .sort() method is in-place, and returns None. If you want something not in-place, which returns a value, you could use

Solution 1

The exception TypeError: 'NoneType' object is not subscriptable happens because the value of lista is actually None. You can reproduce TypeError that you get in your code if you try this at the Python command line:

None[0]

The reason that lista gets set to None is because the return value of list.sort() is None… it does not return a sorted copy of the original list. Instead, as the documentation points out, the list gets sorted in-place instead of a copy being made (this is for efficiency reasons).

If you do not want to alter the original version you can use

other_list = sorted(lista)

Solution 2

lista = list.sort(lista)

This should be

lista.sort()

The .sort() method is in-place, and returns None. If you want something not in-place, which returns a value, you could use

sorted_list = sorted(lista)

Aside #1: please don’t call your lists list. That clobbers the builtin list type.

Aside #2: I’m not sure what this line is meant to do:

print str("value 1a")+str(" + ")+str("value 2")+str(" = ")+str("value 3a ")+str("value 4")+str("\n")

is it simply

print "value 1a + value 2 = value 3a value 4"

? In other words, I don’t know why you’re calling str on things which are already str.

Aside #3: sometimes you use print("something") (Python 3 syntax) and sometimes you use print "something" (Python 2). The latter would give you a SyntaxError in py3, so you must be running 2.*, in which case you probably don’t want to get in the habit or you’ll wind up printing tuples, with extra parentheses. I admit that it’ll work well enough here, because if there’s only one element in the parentheses it’s not interpreted as a tuple, but it looks strange to the pythonic eye..

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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