# [Solved] Type: unsupported operand type(s) for -: ‘float’ and ‘NoneType’ python

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error Type: unsupported operand type(s) for -: ‘float’ and ‘NoneType’ python in python. So Here I am Explain to you all the possible solutions here.

## How Type: unsupported operand type(s) for -: ‘float’ and ‘NoneType’ python Error Occurs?

Today I get the following error Type: unsupported operand type(s) for -: ‘float’ and ‘NoneType’ python in python.

## How To Solve Type: unsupported operand type(s) for -: ‘float’ and ‘NoneType’ python Error ?

1. How To Solve Type: unsupported operand type(s) for -: 'float' and 'NoneType' python Error ?

To Solve Type: unsupported operand type(s) for -: 'float' and 'NoneType' python Error Note in the last example there is a path where neither if case is satisfied,.. thus it could return None

2. Type: unsupported operand type(s) for -: 'float' and 'NoneType' python

To Solve Type: unsupported operand type(s) for -: 'float' and 'NoneType' python Error Note in the last example there is a path where neither if case is satisfied,.. thus it could return None

## Solution 1

Judging by what you’ve provided, and the error this is my conclusion.

The only place you use the `-` operand is in the two points

```sq_err = (rating- predicted_rating) * (rating - predicted_rating)
```

because the error states `'float' and 'NoneType'` we can conclude that `rating` is type `float` and `predicted_rating` is `NoneType`.

You defined `predicted_rating` as:

```predicted_rating = simple_nn(person_id, place_id, 5)
```

So this means that somewhere in your code for the function `simple_nn` you are not returning anything. Perhaps if you used conditions you didn’t evaluate every end path and the function simply returned.

for example… all of these functions return the None type.

```def example1():
pass

def example2():
return

def example3(a = True, b  = True):
if not a:
return True
elif not b:
return False
```

Note in the last example there is a path where neither if case is satisfied,.. thus it could return None

## Solution 2

you can also use import division

from _ _ future _ _ import division

it worked for me in same case

## 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.