Hello,
I was wondering if there is any way for me to open or read CAD files locally into CATIA. Currently, I have the following script(most relevant part at the bottom highlighted), where I have success interacting with CATIA(3D EXPERIENCE CATIA Part Design Plus) by running my script in Visual Studio Code. I have tried a few file formats (.step, CATPart, .3dxml). 

# Just need Geometry access to CATIA from Python

import win32com.client

# Import os to interact with operating system

import os

# Connect ot CATIA/3DEXPERIENCE 

CATIA = win32com.client.Dispatch("CATIA.Application")

print("Connected to CATIA")

# Get Active editor

myEditor = CATIA.ActiveEditor

print("Active Editor:", myEditor)

# Get Product Service

myProdService = myEditor.GetService("PLMProductService")

print("Product Service:", myProdService)

# Get Edited Content

myEntities = myProdService.EditedContent

print("Edited content:",myEntities)

print("Number of Entities:", myEntities.Count)

# Retrieve and then Inspect Entity

entity = myEntities.Item(1)

print("Entity:", entity)

try:

    print("Name:",entity.Name)

except:

    print("No Name attribute")

try:

    print("Type:",entity.Type)

except:

    print("No Type attribute")

#print(dir(entity)) # Prints all attributes

print("3DX object Type:",entity.GetCustomType())

reps = entity.RepInstances

print("RepInstances count:",reps.Count)

for i in range(1, reps.Count + 1):

    rep = reps.Item(i)

    print(i,':', rep.Name)

    try:

        print("custom type:", rep.GetCustomType())

    except:

        print("No Custom Type")

    #print(dir(rep)) # Prints all attributes of rep

    # Get reference of instance

    repRef = rep.ReferenceinstanceOf

    print("repRef:",repRef)

    try:

        print("repRef name:", repRef.Name)

    except:

        print("repRef has no name")

    try:

        print("repRef custom type:", repRef.GetCustomType())

    except:

        print("No repRef custom type")

    #print(dir(repRef)) # Prints all attributes of repRef

    obj = repRef.GetItem("Part")

    print("Part","Found:",obj)

    # We have succesfully reached the actual part object

    # print(dir(obj)) # Prints all attributes of actual part object

    bodies = obj.Bodies

    print("Bodies count:", bodies.Count)

    for i in range(1, bodies.Count + 1):

        body = bodies.Item(i)

        print(i,":",body.Name)

        try:

            shapes = body.Shapes

            print("Shapes Count:",shapes.Count)

        except Exception as e:

            print("Could not access shapes:",e)

    main_body = obj.MainBody

    print("Main body:", main_body.Name)

    # Even though you get PartBody from .MainBody, Body.2 is the actual geometry

    workpiece = bodies.Item("Body.2")

    # Create body reference

    body_ref = obj.CreateReferenceFromObject(workpiece)

    #print(dir(workpiece))

    shapes = workpiece.Shapes

    #print(dir(shapes))

    print("Shapes count:",shapes.Count)

    for k in range(1, shapes.Count + 1):

        shape = shapes.Item(k)

        shape_ref = obj.CreateReferenceFromObject(shape)

        print(k,":",shape.Name)

        print(dir(shape))

    print(body_ref)

    print(shape_ref)

# Import part file into CATIA

CATIA.Visible = True

cad_file = r"file path"

# Test to see if the file path exists

print("File exists: ", os.path.exists(cad_file))

try: 

    doc = CATIA.Documents.Open(cad_file)

    print("Opened with Documents.Open")

except Exception as e:

    print("Open failed:",e)

    try:

        doc = CATIA.Documents.Read(cad_file)

    except Exception as e2:

        print("Read also failed:",e2)

        raise

print("Document name:",doc.Name)

# Heirarchy for accessing 3DShape object

# VPMReference -> VPMRepInstance -> 3DShape

#ENUM = win32com.client.constants 

Edu