python: win32com and cx_Freeze - error

Question

I'm trying to compile a Python 3.3 script using cx_Freeze. The script uses win32com.client to control MediaMonkey. This works perfect when I directly run it. But when I compile it, it throws this exception.

Traceback (most recent call last):
  File "O:\Python\3\lib\site-packages\cx_Freeze\initscripts\Console3.py", line 27, in <module>
    exec(code, m.__dict__)
  File "test.py", line 6, in <module>
    sdb = win32com.client.DispatchWithEvents("SongsDB.SDBApplication", MMEventHandler)
  File "O:\Python\3\lib\site-packages\win32com\client\__init__.py", line 260, in
 DispatchWithEvents
    clsid = disp_class.CLSID
AttributeError: 'NoneType' object has no attribute 'CLSID'

It doesn't even work when I try to compile a really short script which uses win32com.client:

import win32com.client

class MMEventHandler:
    pass

sdb = win32com.client.DispatchWithEvents("SongsDB.SDBApplication", MMEventHandler)

And this is my setup.py script:

from cx_Freeze import setup, Executable


includes = []
excludes = []
packages = ['win32com', 'shlex', 'os', 'pythoncom', 'base64', 'tornado']
filename = "test.py"
setup(
    name = 'Test',
    version = '0.1',
    description = 'test',
    author = 'no',
    author_email = '[email protected]',
    options = {'build_exe': {
        'excludes':excludes,
        'packages':packages,
        'includes':includes
        }},
    executables = [Executable(filename, base = None, icon = None)])

Is it the same error that you get from your short example script? — Thomas K
– Thomas K, Commented Oct 29, 2013 at 16:56
This message suggests that you need to include the win32com.gen_py package when you freeze it. Let me know if that helps. — Thomas K
– Thomas K, Commented Oct 29, 2013 at 17:13
I'm going to look into this - could you put the output from freezing it in a pastebin somewhere? — Thomas K
– Thomas K, Commented Oct 29, 2013 at 17:39
I think I know what's going on. I 'fixed' cx_Freeze to ignore modules which don't have a valid Python name, but it looks like win32com relies on some like that. Do you have .py files with dashes in the name in `O:\Python\3\lib\site-packages\win32com\gen_py` ? If so, try using the previous release from here and see if that works any better. — Thomas K
– Thomas K, Commented Oct 29, 2013 at 18:21

Thomas K · Accepted Answer · 2013-10-30 17:24:01Z

2

Reposting as an answer, to summarise:

For cx_Freeze 4.3.2, I made a change so that it would only copy modules with names which are valid Python identifiers (so they can be imported). However, win32com appears to rely on modules such as:

win32com\gen_py\E602ED16-8EF9-4F08-B09F-6F6E8306C51Bx0x1x0.py

The hyphens (-) in the filename make it not a valid Python identifier, so it doesn't get copied. I've opened an issue for cx_Freeze. In the meantime, a workaround is to downgrade to cx_Freeze 4.3.1, which you can download from SourceForge.

Also, I think that these modules are generated when you first wrap a COM object. So make sure that you run your code before freezing it.

answered Oct 30, 2013 at 17:24

Thomas K

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2 Comments

user1464473 Over a year ago

Was this ever resolved? cx_Freeze is on 4.3.4 now. Would I still need to go back to 4.3.1 if having this same problem? I found I could fix the problem if I run the python script on local machine first, and then freeze, and then copy the .py file(s) with the dashes to the correct library.zip folder and re-zip it.

Thomas K Over a year ago

It got fixed, but there hasn't been a release of cx_Freeze since then. You could install cx_Freeze from the development version.

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