Hello Pete Charalampopoulos,

To resolve this error you just need to add a condition to check price_subtotal as follow and if the price_subtotal is zero then x_studio_gross_margin should also be zero.

for record in self:

    record['x_studio_gross_margin'] = (record.x_studio_gross_profit / record.price_subtotal) if record.price_subtotal else 0

I hope this will help you. 

Thanks & Regards,
Email:   odoo@aktivsoftware.com      

Skype: kalpeshmaheshwari

To handle the "float division by zero" error in Python, you can use a try-except block to catch the `ZeroDivisionError` exception. This way, you can manage the situation when the denominator is zero without having your program crash.

Here's an example of how you might modify your code to handle this:

```python

try:

    # Your division code here

    # Example: result = numerator / denominator

except ZeroDivisionError:

    # Handle the division by zero error

    # or

    # result = None

```

In this example, replace the comment `# Your division code here` with your actual division operation. If the denominator in your division is zero, the `ZeroDivisionError` will be raised, and the code within the `except` block will execute. This allows you to handle the error gracefully, such as by printing an error message or setting the result to a default value like `None`.