RuntimeWarning: 'invalid value encountered in sqrt' - Python Error Solution

This warning is raised when the square root of a negative number is taken, resulting in an imaginary number or NaN (not a number). The code is likely trying to compute the distance between an object and a camera using the focal length and pixel area, but there may be issues with the input values or the calculation itself. It is recommended to check the values of 'actual_area' and 'pixel_area' to ensure they are valid, and to review the formula for computing distance to make sure it is correct. Additionally, it may be helpful to handle cases where the result of the calculation is invalid, such as by setting the distance to a default value or raising an error.