Python script cannot proceed

Revit
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1

Dynamo Capture
Dynamo Capture1129×567 127 KB

Hello,

I created a simple dynamo for checking intersection which is the first watch node in the screen capture. And I want to simplify the result to the second watch node. For this I
wrote a script to do it which is successful as shown.

However, when I tried to integrated the second part into the first part of the Python script. It simply doesn’t work and I cannot figure out the reason.

Could anyone tell me why it cannot work?

Here is the script I used in the first python node:

# The inputs to this node will be stored as a list in the IN variables.
dataEnteringNode = IN
geo1 = IN[0] #Geometry 1
geo2 = IN[1] #Geometry 2

def intersection(in1):
    x = []
    for a in geo2:
        x.append(in1.Intersect(a))
    return x
    
result = list(map(intersection, geo1))

temp = []   
output = []

def flatsub(data):
    for item in data:
        if isinstance(item, list):
            if not len(item):
            	temp.append(0)
            else:
            	flatsub(item)
        else:
            temp.append(item)

for element in result:
    if isinstance(element, list):
        flatsub(element)
        output.append(temp)
        temp = []
    else:
        output.append(element)


# Assign your output to the OUT variable.
OUT = output

And here is the second one which is the same of the lower part of the first python script:

# Load the Python Standard and DesignScript Libraries
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

# The inputs to this node will be stored as a list in the IN variables.
dataEnteringNode = IN

# Place your code below this line

result = IN[0]
temp = []   
output = []

def flatsub(data):
    for item in data:
        if isinstance(item, list):
            if not len(item):
            	temp.append(0)
            else:
            	flatsub(item)
        else:
            temp.append(item)

for element in result:
    if isinstance(element, list):
        flatsub(element)
        output.append(temp)
        temp = []
    else:
        output.append(element)


# Assign your output to the OUT variable.
OUT = output

Thanks.
Austin

2

It could be any number of reasons that the Python once combined is erroring.

Rather than posting the 2 that work can you post the version where it is combined and not? This way it can be debugged properly.

3

It shows no error at all, but the results after combined is the same before I combined. It makes me don’t know to debug.

4

Hello
the method Geometry.Intersect(Geometry) return an Net Array not a Python list

image
image1722×499 113 KB

it works on the second node, because Dynamo out wrapper converted it

try to use if hasattr(result, '__iter__'): instead of isinstance(result, list):

3 Likes
5

Again, it’s hard to help without seeing the combined code.

The intersections are returning a list, which is expected. Before you make any changes, be sure that you won’t miss anything by reducing the list structure. Intersections return a list because the intersection of two objects can potentially have multiple intersecting geometries. If you know for sure that your intersections will only ever return a singular geometry then you can reduce the structure, otherwise you may be removing some intersections.

As for the code cleanup…
As previously stated, the intersection returns a list. The first thing to do is check to see if that list is empty - I’d recommend checking list length - then return either a 0 or the first item in the intersection list depending on length condition.

6

@c.poupin It works now. Thanks a lot.
Is that if the object is under Autodesk from GetType(), it is not a python object? I tried to search net array to find more reference but little relevant result is shown.

@Nick_Boyts The first code I pasted is the combined one. The second one is omitting the intersection part from the first one. Anyway, thanks for your reply.

7

It’s a Net method