ImportError: cannot import name Publisher

Question

I succesfully created an executable version (Py2exe, Pyinstaller) of my application. When I try to run the app from .exe, I get an error as follows in the log file:

Traceback (most recent call last): File "CreateAS.pyw", line 8, in <module> ImportError: cannot import name Publisher

I am really stuck in this part. Could you help me out?

Thanks

Answer 1

I'm guessing that you are using a version of wxPython that is >= 2.8.11.0? If so, the wx.lib.pubsub package has changed. This page describes the changes. There is also a thread on the wxPython mailing list here that talks about this.

To make this all work in my project, I did the following described here which was part of the above mailing list thread. I summarize below:

The much preferable alternative (ie no hacks!) if you can hack it (sorry!) is to use the same messaging protocol as v1, but in latest API, this is called "arg1":

# only in app's startup  module   
from wx.lib.pubsub import setuparg1   
# in all modules that use pubsub 
from wx.lib.pubsub import pub as Publisher

and replace any occurence of "Publisher()." by "Publisher."

Then in my setup.py script, I had to add the following to the options:

options = {
    "py2exe": {"packages": ['wx.lib.pubsub']}
}
setup(data_files=data_files,
      windows=[
              {'script': 'btpos.py'],
               options=options)

You should now be able to build an executable using the new version of pubsub, but with the old api. You might also want to check out the new v3 api of pubsub. If your project isn't too big, you can probably get by without changing too much.

Answer 2

try like this:

from wx.lib.pubsub import setuparg1
from wx.lib.pubsub import pub as Publisher

Then: replace any occurence ofPublisher()byPublisher.

Answer 3

I was using an example code that used wx.lib.pubsub to study from and came across this problem too.

To fix this issue simply, I just changed the line:

from wx.lib.pubsub import Publisher as pub

To:

from wx.lib.pubsub import pub

The accepted answers has links that still make it right, but for simplicity, I've added this solution because the accepted solution was a little confusing.