Hi, Before last update of Rhino a python component in grasshopper containing this snippet worked, but not any more. “”" import rhinoscriptsyntax as rs for i in x: print (rs.Area(i)) “”" Now it raises “TypeError: Parameter must be a Guid or string representing a Guid” The problem is that I ha…

I don’t know what is causing the issue, but something like this might work as a workaround. for i in x: a = rs.coerceguid(i) print (rs.Area(a))

Hi, That was my thought as well, but it gives me the same result. Traceback (most recent call last): File “rhinocode:///grasshopper/1/d71b58ee-0172-4f91-9ee3-43a2ab7f4f43/7abdee76-b16c-472b-96e4-c68fe4a9df94”, line 5, in File “C:\Users\sonny.bergenholtz.rhinocode\py39-rh8\site-rhinopython\rhino…

Try setting the x Param to list mode, on the Python component itself within Grasshopper.

That is already done with the same result as shown above. To sort out my settings hopefully this picture does (Yoda) :slight_smile: [image]

Great. Double check what a is, from the return of rs.coerceguid. The code assumes the call was successful, but a lot of those functions can return None. Finally, I’m not sure whether you have Rhino or Grasshopper geometry in Srf. Try right clicking it and embedding it to get Grasshopper geometry…

This will do it. By adding the element to a scriptcontext creates a Guiid: import rhinoscriptsyntax as rs import scriptcontext as sc for i in x: id = sc.doc.Objects.Add(i) a = rs.Area(id) print(a) [image] There is a lot of theories on this: [image] Automatically bake …

Thanks for the help. But can someone explain why this is happening in Grasshopper for Rhino 8 and not in Grasshopper for Rhino 7? And how will this effect all .gh files that were made in GH for Rhino 7 when I start using them in GH Rhino 8? [image]

Doesn’t anyone at Mcneel have an explanation on why this happens? Is it a bug or is the intension that this is how it is suppose to be? I have written many functions based on this concept so if there will be a fix for this I gladly wait and not have to rewrite everything. :slight_smile: @DavidRut…

just for info, the “old” GHPython component from R7 does not give me that error on Version 8 SR7 (8.7.24107.13001, 2024-04-16) [image] [image] Old_GHPy_in_R8_SR7_24107_13001.gh (4.3 KB) [just as clarification, my post is in relation to this image of yours] [image]

I think the one you refer to is Ironpython 1 from Rhino 7 which seems to work fine. The component called IPy2 in my picture is Ironpython 2 and from that I get the same result as the Py3 component. Other then that I think we have came to the same conclusion. :slight_smile:

Python "TypeError: Parameter must be a Guid"

Grasshopper

eirannejad (Ehsan Iran-Nejad) April 18, 2024, 10:46pm 15

Okay pushed a fix for this in next 8.7 and added more tests to my unit tests so this doesn’t happen again

How to Access Real Rhino GUIDs in Grasshopper Python Scripts

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