[Bug?] Transformation - Calculation - Python Entry Modes

Hellos,

Assume I have a simple calculation in python 

By default when calculations are created , they always have 2 entry points ,
 

when my calculations requires only 1 entry point , like above , if I dont' delete the 2nd entry point I get no answer in preview mode. See example below

 
 

 

I do not think we can classify this as a bug.
All inputs must have values assigned first for all multi-input transformations.
Calculation, Lookups ETC.   

Peter.Jonson wrote:

I do not think we can classify this as a bug.
All inputs must have values assigned first for all multi-input transformations.
Calculation, Lookups ETC.   

Hence my post has [Bug?] , it's something easy to miss and I was scratching my head what was going wrong