How to get parameters and mass of a part with Python

[Anonymous]

Hi all,

I am trying to get the list of parameters and mass properties from a .ipt, but it´s not working. Retrieving description and designer from the iproperties is in contrast no problem.

I´m a mechanical engineer and I´m using Python because it´s the only programming language I know.

This is my code:

import win32com.client
from win32com.client import gencache


oApp = win32com.client.Dispatch('Inventor.Application')
oApp.Visible = True
mod = gencache.EnsureModule('{D98A091D-3A0F-4C3E-B36E-61F62068D488}', 0, 1, 0)
oApp = mod.Application(oApp)
oApp.SilentOperation = True
oDoc = oApp.ActiveDocument
prop = oApp.ActiveDocument.PropertySets.Item("Design Tracking Properties")

# getting description and designer from iproperties (works)
Descrip = prop('Description').Value
Designer = prop('Designer').Value
print(Descrip)
print(Designer)

# getting mass and parameters (doesn´t work)
MassProps = oDoc.ComponentDefinition.MassProperties
partDef = oDoc.ComponentDefinition.Parameters

and this is the error message I get:

File "M:/Python/Idas_Arbeit/inventor_7.py", line 21, in <module>
    oMassProps = oDoc.ComponentDefinitions.MassProperties
  File "M:\zzz_Anaconda\lib\site-packages\win32com\client\__init__.py", line 473, in __getattr__
    raise AttributeError("'%s' object has no attribute '%s'" % (repr(self), attr))
AttributeError: '<win32com.gen_py.Autodesk Inventor Object Library.Document instance at 0x2937542647032>' object has no attribute 'ComponentDefinitions'

I use Inventor 2018 and Python 3.6.2. on Windows 10.

Any ideas? Your help would be very much appreciated!

[bradeneuropeArthur]

Hi,

For the massprop you need to do the following:

# getting mass and parameters (doesn´t work)
MassProps = oDoc.ComponentDefinition.MassProperties.mass

[bradeneuropeArthur]

Hoi need another declaration

Make the declaration to PartComponentDefinition for parts.

Make the declaration to assemblyComponentDefinition for assemblies.

This should do it!

[Anonymous]

Hi bradeneurope,

thanks for your support. Unfortunately this does not help, I still get the same error: ...object has no attribute 'ComponentDefinition'

[Anonymous]

how do I do this:

"Make the declaration to PartComponentDefinition for parts.

Make the declaration to assemblyComponentDefinition for assemblies."

Could you please provide the Python code for it?

[bradeneuropeArthur]

Take a look at this:

You need to declare your component definitions as first as part and assembly.

Dim bA As AssemblyDocument
Set bA = a.ActiveDocument

Dim cA As AssemblyComponentDefinition
Set cA = bA.ComponentDefinition
Dim dA As MassProperties
Set dA = cA.MassProperties

-----------------------------

Dim bP As PartDocument
Set bP = a.ActiveDocument

Dim cP As PartComponentDefinition 
Set cP = bP.ComponentDefinition 
Dim dP As MassProperties 
Set dP = cP.MassProperties

So do not use:

.. oDoc.ComponentDefinitions.Massproperties

[dgreatice]

"""declaration"""

oPartDoc = PartDocument()
oPropset = PropertySets()
oPartCompdef = PartComponentDefinition()
MassProp = MassProperties()
MassofPart = Double()
oDescrip = Property()
oDesigner = Property()
oParams = Parameters()
oModelParams = ModelParameters()
oModelParam_1 = ModelParameter()

"""Set the Object"""

oPartDoc = ThisApplication.ActiveDocument
PropertySets = opartdoc.PropertySets.item('Design Tracking Properties')
oDescrip = propertysets.item('Description')
oDesigner = propertysets.item('Designer ')
oPartCompdef = oPartDoc.ComponentDefinition
MassProp = oPartCompdef.MassProperties
MassofPart = MassProps.Mass
oParams = oPartCompDef.Parameters
oModelParams = oParams.ModelParameters
oModelParam_1 = oModelParams.Item(1)

"""Get the Data"""

print(oDescrip.value)
print(oDesigner.value)
print(massofpart)
print(oModelParam_1.Value + ' cm')

[Anonymous]

Hi dgreatice,

thank you for your idea!

Unfortunately it is not working yet. I get the following error: NameError: name 'PartDocument' is not defined.

I think the declaration you did is necessary, but somehow Python is expecting it in a different way?!

[dgreatice]

are python can add reference library?

at Visual Studio, I need to add reference library to read class of API Inventor. Like:

C:\Program Files\Autodesk\Inventor 2014\Bin\Public Assemblies\Autodesk.Inventor.Interop.dll

[bradeneuropeArthur]

Take a look at my last post. This should solved it Maybe.

[Anonymous]

Hi dgreatice,

adding the library sounds like the right thing to do. I found out that the module for this is called "ctypes" in Python, however I didn´t manage to install and use it properly so far.

I keep trying ...

[dgreatice]

hi,

try to find any clue from youtube.

https://www.youtube.com/watch?v=VHxqGJc8hsM&t=62s

[Anonymous]

Hello,

I find myself in the same situation, I only know Python and I have a few scripts that used ComponentDefinition method. They used to work well, on Inventor 2015, but since the company updated to Inventor 2015 SP2 Update 6, a few days ago, my scripts stopped functioning. Autodesk must have modified something in their COM code... Have you found any solution for your problem yet?

Best regards,

Liviu

[chandra.shekar.g · Accepted solution]

Hi @Anonymous,

Try the following python code to retrieve mass properties

import win32com.client
from win32com.client import gencache, Dispatch, constants, DispatchEx


oApp = win32com.client.Dispatch('Inventor.Application')
oApp.Visible = True
mod = gencache.EnsureModule('{D98A091D-3A0F-4C3E-B36E-61F62068D488}', 0, 1, 0)
oApp = mod.Application(oApp)
# oApp.SilentOperation = True
oDoc = oApp.ActiveDocument
oDoc = mod.PartDocument(oDoc)

prop = oApp.ActiveDocument.PropertySets.Item("Design Tracking Properties")

# getting description and designer from iproperties (works)
Descrip = prop('Description').Value
Designer = prop('Designer').Value
print(Descrip)
print(Designer)



# getting mass and parameters (doesn´t work)
MassProps = oDoc.ComponentDefinition.MassProperties
partDef = oDoc.ComponentDefinition.Parameters

dArea = MassProps.Area
print(dArea)

lNum = partDef.Count
print(lNum)

Thanks and regards,

[Anonymous]

Hi chandra.shekar.g,

I tried your solution, but I got stuck at:

oApp = mod.Application(oApp)

Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
TypeError: 'module' object is not callable

I am using Pyhton 2.7.3 32bit on win32 in a PyScriper console.

What I find curious is that I have another application written in Python, which uses ComponentDefinition.Parameters, which I 'froze' with py2exe. That one still works fine, but if I copy the source code in the Python interpreter, I get the error posted by our friend ma23UNC:

object has no attribute 'ComponentDefinitions'

It is such a pity, I really enjoyed automating Inventor in Python....

Thank you,

Liviu

[bradeneuropeArthur]

try this

import win64com.client
from win64com.client import gencache, Dispatch, constants, DispatchEx


oApp = win64com.client.Dispatch('Inventor.Application')
oApp.Visible = True
mod = gencache.EnsureModule('{D98A091D-3A0F-4C3E-B36E-61F62068D488}', 0, 1, 0)
oApp = mod.Application(oApp)
# oApp.SilentOperation = True
oDoc = oApp.ActiveDocument
oDoc = mod.PartDocument(oDoc)

prop = oApp.ActiveDocument.PropertySets.Item("Design Tracking Properties")

# getting description and designer from iproperties (works)
Descrip = prop('Description').Value
Designer = prop('Designer').Value
print(Descrip)
print(Designer)



# getting mass and parameters (doesn´t work)
MassProps = oDoc.ComponentDefinition.MassProperties
partDef = oDoc.ComponentDefinition.Parameters

dArea = MassProps.Area
print(dArea)

lNum = partDef.Count
print(lNum)

[bradeneuropeArthur]

Remarks:
Please put your Software versions in your heading so we can see the software version you use.

[Anonymous]

To the best of my knowledge, 'win64com' does not exist (yet?)....

[bradeneuropeArthur]

Does this work then:

import win32com.client
from win32com.client import gencache, Dispatch, constants, DispatchEx


oApp = win32com.client.Dispatch("Inventor.Application")
oApp.Visible = True
mod = gencache.EnsureModule("{D98A091D-3A0F-4C3E-B36E-61F62068D488}", 0, 1, 0)
oApp = mod.Application(oApp)
# oApp.SilentOperation = True
oDoc = oApp.ActiveDocument
oDoc = mod.PartDocument(oDoc)

prop = oApp.ActiveDocument.PropertySets.Item("Design Tracking Properties")

# getting description and designer from iproperties (works)
Descrip = prop("Description").Value
Designer = prop("Designer").Value
print(Descrip)
print(Designer)



# getting mass and parameters (doesn´t work)
MassProps = oDoc.ComponentDefinition.MassProperties
partDef = oDoc.ComponentDefinition.Parameters

dArea = MassProps.Area
print(dArea)

lNum = partDef.Count
print(lNum)

I have used "######" instead of '######'

[Anonymous]

Hi,

No, it still does not work. Does it work for you?

*** Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win32. ***
*** Remote Python engine  is active ***
>>> import win32com.client
>>> win32com.client
<module 'win32com.client' from 'C:\Users\________\Documents\PORTABLE PROGRAM FILES\Portable Python 2.7.3.1\App\lib\site-packages\win32com\client\__init__.pyc'>
>>> from win32com.client import gencache, Dispatch, constants, DispatchEx
>>> oApp = win32com.client.Dispatch("Inventor.Application")
>>> oApp
<win32com.gen_py.Autodesk Inventor Object Library.Application instance at 0x45696624>
>>> oApp.Visible = True
>>> mod = gencache.EnsureModule("{D98A091D-3A0F-4C3E-B36E-61F62068D488}", 0, 1, 0)
>>> mod
<module 'win32com.gen_py.D98A091D-3A0F-4C3E-B36E-61F62068D488x0x1x0' from 'C:\Users\______\AppData\Local\Temp\gen_py\2.7\D98A091D-3A0F-4C3E-B36E-61F62068D488x0x1x0\__init__.pyc'>
>>> oApp = mod.Application(oApp)
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
TypeError: 'module' object is not callable

Inventor 2015

64-Bit Edition

Build 223, Release 2015 SP2 Update 6

Windows 7 Entreprise SP1