An Import Error When Using Py2app

I'm using py2app to pack up my python script as an .app document on mac but find an import error: Traceback (most recent call last): File '/Library/Frameworks/Python.framework/Vers

Solution 1:

This is a temporary fix until the new update is released, some time later this month.

Find path to the py2app directory as you will need to change some lines of code in a few files in this directory.

If you have terminal you can find the directory with:

find ~/ -type f -name “*py2app*”

FILE 1

py2app/build_app.py (line 614)

Replace:

ifisinstance(self.plist, plistlib.Dict):

    self.plist = dict(self.plist.__dict__)

else:

  self.plist = dict(self.plist)

With the following:

ifnotisinstance(self.plist, dict):

    self.plist = dict(self.plist)

FILE 2

py2app/create_appbundle.py (line 26)

Replace:

dirs = [contents, resources, platdir]

plist = plistlib.Plist()

plist.update(kw)

plistPath = os.path.join(contents, 'Info.plist')

ifos.path.exists(plistPath):

    if plist != plistlib.Plist.fromFile(plistPath):

        for d in dirs:

            shutil.rmtree(d, ignore_errors=True)

for d in dirs:

    makedirs(d)

plist.write(plistPath)

With the following:

dirs = [contents, resources, platdir]

plistPath = os.path.join(contents, 'Info.plist')

ifos.path.exists(plistPath):

    for d in dirs:

        shutil.rmtree(d, ignore_errors=True)

for d in dirs:

    makedirs(d)

plistlib.writePlist(kw, plistPath)

FILE 3

py2app/script_py2applet.py (line 13)

Replace:

from plistlib importPlist

With the following:

import plistlib

Also, replace (line 115)

plist = Plist.fromFile(fn)

With the following:

plist = plistlib.fromFile(fn)

Then you can finally create the setup.py file in your app directory with:

py2applet --make-setup my_project.py

And build the standalone app with:

python setup.py py2app -A

Contribution to this guy for most of the code above.

The reason for this issue is due to Plist being depreciated in python3.7. See python docs