Python give null-value if argument doesn't work

DesignScript
1

Hey Guys,

I have this little bit of python code where i try to create a surface.byperimeterpoints. I want to make it that the code gives a null-value when the argument is not eligible, like the Function Apply method in the picture. Can somebody help me out on how to solve this problem in Python?

image
image1428×768 72.2 KB

2

Hi,
can you show the error?
Note:
the method need a list as argument

image

3

Hi,
I’m willfully puting in a wrong input. I want it to give a null value without the warning if the argument is not valid.

4

This is generally bad coding practice, but fits in a few niche conditions.

You’ll need to proceed your action with a try statement, and then provide the except statement.

Something like this:

try:
    outcome = Surface.ByPerimeterPoints(points)
except:
    outcome = None

The reason this is bad practice is that you are concealing the issue from your end users. There is a problem, they won’t find it without reverse engineering your entire code base.

A better solution would be to provide the exception rather then the null. This can be done by modifying the except portion of the code to be something like this:

except:
    Import traceback
    outcome = traceback.formatexec()
2 Likes
5

Thank you very much for the advice and help!

1 Like