pyautocad Select the solution of object error reporting

brief introduction

    pyautocad The library is designed by Russian engineers Roman Haritonov Development , For simplified use Python Language writing AutoCAD ActiveX Automation Script . The name of the package file and GIthub Here it is .

Mistakes show

    In the official documentation , Provides a solution for iteratively selecting objects ：

for text in acad.iter_objects('Text'):
    print text.TextString, text.InsertionPoint
for obj in acad.iter_objects(['Text', 'Line']):
    print obj.ObjectName

    But after practical use , My machine will prompt the following error ：

_ctypes.COMError: (-2147467262, ' This interface is not supported ', (None, None, None, 0, None))

_ctypes.COMError: (-2147467262, 'No such interface supported', (None, None, None, 0, None))

    Access Forum , I find “-2147467262” This error is usually caused by a poor connection with the program used , My machine has been installed AutoCAD2008、AutoCAD2010、AutoCAD2020、AutoCAD2021 Several versions , So it may be the error caused by too many installed versions .

Preliminary solution

    In the Forum , Two solutions are given , The first solution is through acad.iter_objects_fast, Instead of acad.iter_objects, After testing, it is found that it is OK , But there will be a bug. My need is to get all the objects , Then delete it , Use acad.iter_objects_fast This method , Always can't get the last object , That is, the last object will be left after each deletion .
    Finally consider the second solution , Change to use win32com This package controls AutoCAD.

Final solution

    First import the package ：import win32com.client as win32, If you don't have this bag , have access to pip install win32com Download . But my machine will report an error ：DLL load failed while importing win32api: The specified module was not found , Baidu after discovery , Put the environment ***\Lib\site-packages\pywin32_system32\ What's in it *** Copy to ***C:\Windows\System32*** Can solve .

    And then use win32com To control CAD, The code is as follows ：

#  establish AutoCAD example 
wincad = win32.Dispatch("AutoCAD.Application")
doc = wincad.ActiveDocument
#  Clear existing selection sets 
try:
    self.doc.SelectionSets.Item("SS1").Delete()
except:
    print("Delete selection failed")
#  Create selection set 
slt = self.doc.SelectionSets.Add("SS1")
#  Future generations 
slt.Select(5)  # acSelectionSetAll = 5
#  Delete... In turn 
for i in range(slt.Count):
     slt[i].delete()

    win32com For other ways to use, see the reference link .

Reference link

pyautocad example is not running
ImportError: DLL load failed while importing win32api: The specified module was not found
The fifth chapter Create and edit AutoCAD object
Create and edit AutoCAD object （VBA&python）