Unable to load DeDRM_calibre_plugin with calibre 4.1 on Fedora 31 #928

xjvs · 2019-10-31T15:14:10Z

Hi,

I'm running calibre 4.1 on Fedora 31 which has Python3 as default, while loading "DeDRM_plugin.zip", I got error messages as below:

calibre, version 4.1.0
ERROR: Unhandled exception: <b>SyntaxError</b>:invalid syntax (calibre_plugins.dedrm.__init__, line 167)

calibre 4.1  embedded-python: False is64bit: True
Linux-5.3.7-301.fc31.x86_64-x86_64-with-fedora-31-Thirty_One Linux ('64bit', 'ELF')
('Linux', '5.3.7-301.fc31.x86_64', '#1 SMP Mon Oct 21 19:18:58 UTC 2019')
Python 3.7.4
Linux: ('Fedora', '31', 'Thirty One')
Interface language: en_GB
Traceback (most recent call last):
  File "/usr/lib64/calibre/calibre/gui2/preferences/plugins.py", line 318, in add_plugin
    plugin = add_plugin(path)
  File "/usr/lib64/calibre/calibre/customize/ui.py", line 472, in add_plugin
    plugin = load_plugin(path_to_zip_file)
  File "/usr/lib64/calibre/calibre/customize/ui.py", line 61, in load_plugin
    return loader.load(path_to_zip_file)
  File "/usr/lib64/calibre/calibre/customize/zipplugin.py", line 202, in load
    m = importlib.import_module(plugin_module)
  File "/usr/lib64/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 668, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 638, in _load_backward_compatible
  File "/usr/lib64/calibre/calibre/customize/zipplugin.py", line 180, in load_module
    import_name), 'exec', dont_inherit=True)
  File "calibre_plugins.dedrm.__init__", line 167
    print u"{0} v{1}: Copying needed library files from plugin's zip".format(PLUGIN_NAME, PLUGIN_VERSION)
                                                                    ^
SyntaxError: invalid syntax

And this is the calibre info:

$ calibre-debug -g
QSocketNotifier: Can only be used with threads started with QThread
calibre 4.1  embedded-python: False is64bit: True
Linux-5.3.7-301.fc31.x86_64-x86_64-with-fedora-31-Thirty_One Linux ('64bit', 'ELF')
('Linux', '5.3.7-301.fc31.x86_64', '#1 SMP Mon Oct 21 19:18:58 UTC 2019')
Python 3.7.4
Linux: ('Fedora', '31', 'Thirty One')
Interface language: en_GB
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 157.31612903225806 x 161.36470588235292
Using calibre Qt style: True

It seems the DeDRM plugin only support python2, is there a workaround for me to load and enable the plugin? Fedora 31 has Python3.7 as default, but Python2.7 is also available.

The text was updated successfully, but these errors were encountered:

j-howell · 2019-10-31T15:52:09Z

I don’t know about the DeDRM plugin in particular, but Calibre is currently a python 2 application. Work is underway to make it Python 3 compliant, but it is not yet complete and I suspect that many plugins won’t be updated until Calibre itself is ready.

See https://calibre-ebook.com/download_linux for info about installing under Linux.

xjvs · 2019-11-01T03:41:40Z

I don’t know about the DeDRM plugin in particular, but Calibre is currently a python 2 application. Work is underway to make it Python 3 compliant, but it is not yet complete and I suspect that many plugins won’t be updated until Calibre itself is ready.

This is not true, Calibre already supports Python 3, at least on my system (Fedora 31) Calibre 4.1 is built and running with Python 3.

Seems there is no workaround to load DeDRM from Python 3 Calibre. Hi DeDRM maintainers, is there any plan on supporting Python 3 for DeDRM_calibre_plugin?

rrix · 2019-11-03T04:56:28Z

Doing nothing but running 2to3 on the codebase provides nearly 9000 lines in changes, this doesn't seem like a trivial undertaking to actually get it working.

I guess a work around would be to try to get a calibre flatpak running it under py2 ? I don't know if the hardware support would work though.

audetto · 2019-11-07T21:18:37Z

I can only confirm it.
And installing the F30 rpm does not work either.

audetto · 2019-11-07T22:05:25Z

It is massive pain, but boxes and F30 came to the rescue.

voland66 · 2019-11-24T08:15:49Z

DeDRM plugin works on fedora 31 with calibre 3.48.0 installed. The rpm from F30 does not run but a binary install with the command below works:

sudo -v && wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sudo sh /dev/stdin install_dir=/usr/local version=3.48.0

acdingman · 2019-12-04T06:13:01Z

Similar results with Calibre 4.5 on Fedora 31 with Python 3.

calibre, version 4.5.0
ERROR: Unhandled exception: SyntaxError:invalid syntax (calibre_plugins.dedrm.init, line 167)

calibre 4.5 embedded-python: False is64bit: True
Linux-5.3.9-300.fc31.x86_64-x86_64-with-fedora-31-Thirty_One Linux ('64bit', 'ELF')
('Linux', '5.3.9-300.fc31.x86_64', '#1 SMP Wed Nov 6 16:13:19 UTC 2019')
Python 3.7.5
Linux: ('Fedora', '31', 'Thirty One')
Interface language: None
Successfully initialized third party plugins: KePub Input (3, 0, 0) && KePub Metadata Reader (3, 0, 2)
Traceback (most recent call last):
File "/usr/lib64/calibre/calibre/gui2/preferences/plugins.py", line 318, in add_plugin
plugin = add_plugin(path)
File "/usr/lib64/calibre/calibre/customize/ui.py", line 472, in add_plugin
plugin = load_plugin(path_to_zip_file)
File "/usr/lib64/calibre/calibre/customize/ui.py", line 61, in load_plugin
return loader.load(path_to_zip_file)
File "/usr/lib64/calibre/calibre/customize/zipplugin.py", line 200, in load
reload(m)
File "/usr/lib64/calibre/polyglot/builtins.py", line 113, in reload
return importlib.reload(module)
File "/usr/lib64/python3.7/importlib/init.py", line 169, in reload
_bootstrap._exec(spec, module)
File "", line 628, in _exec
File "/usr/lib64/calibre/calibre/customize/zipplugin.py", line 180, in load_module
import_name), 'exec', dont_inherit=True)
File "calibre_plugins.dedrm.init", line 167
print u"{0} v{1}: Copying needed library files from plugin's zip".format(PLUGIN_NAME, PLUGIN_VERSION)
^
SyntaxError: invalid syntax

mlturner88 · 2019-12-23T14:55:40Z

It is massive pain, but boxes and F30 came to the rescue.

@audetto did you find a workaround? If so, what was your solution?

hevanaa · 2019-12-23T17:50:30Z

It is massive pain, but boxes and F30 came to the rescue.

I also installed F30 in Boxes. That is quite an easy workaround as workarounds goes. I guess some of us experiencing most pain will eventually start porting the python 2 code...

hevanaa · 2019-12-23T17:52:56Z

And there is already a Py3 conversion going on: #931

rrix · 2019-12-31T22:26:02Z

The Flatpak image on flathub works with OBOK without special configuration:

rrix@tres-ebow:~ :) flatpak info com.calibre_ebook.calibre

Calibre - E-book manager

          ID: com.calibre_ebook.calibre
         Ref: app/com.calibre_ebook.calibre/x86_64/stable
        Arch: x86_64
      Branch: stable
     Version: 4.7
     License: GPL-3.0
      Origin: flathub
  Collection: org.flathub.Stable
Installation: system
   Installed: 353.5 MB
     Runtime: org.freedesktop.Platform/x86_64/19.08
         Sdk: org.freedesktop.Sdk/x86_64/19.08

      Commit: 5128ea0a3d02dae21326099915f8ae6a49f3a70fc282fbf5dc744142ca944804
      Parent: cb0cab74302066b972572e1537ee66f87d035763e3dee1de9764382c101d6643
     Subject: update calibre to 4.7 (c1e01358)
        Date: 2019-12-27 16:16:44 +0000

hevanaa · 2019-12-31T23:09:52Z

That's great information and I might end up installing it (even though a voice within me whispers that developers and users are becoming lazy when they prefer keeping and installing old frameworks and blobs, filling up our hard disks with redundant libraries within flatpaks, snaps and appimages, and hindering progress). - insert old man yells at cloud image here -

rrix · 2020-01-07T23:32:23Z

(even though a voice within me whispers that developers and users are becoming lazy when they prefer keeping and installing old frameworks and blobs, filling up our hard disks with redundant libraries within flatpaks, snaps and appimages, and hindering progress). - insert old man yells at cloud image here -

There's ongoing work to port the library to py3k, this has been fine in the interim. :)

racoco · 2020-04-04T21:35:53Z

I am running FC-31 and Calibre 4.12.0.
I also experienced the same issue as acdingman when attempting to install the DeDRM_plugin.zip (it is v6.6.3): exception got thrown on line 167 of the init.py file inside the zip bundle.

[But I was able to successfully install the other recommended plugin: kfx-input.zip]

Looking at that line of code, I commented it out (it's just a print statement after all) to see what would happen. Well, a similar print statement on line 179 threw an exception. Unfortunately, it was inside an exception handling block so clearly I was screwed. I could not figure out what was wrong, so I googled this issue and found this and other pages.

Reading it all, it seemed clear that the issue had to do with Calibre and Python 3 incompatibilities and that there was nothing to be done until the Calibre folks addressed the issue.

Out of curiosity, I imported the AZW4 Kindle Fire file for the Kindle eBook I recently bought. The import succeeded w/o incident, so I took the next step of converting it to PDF expecting to see decryption errors of some type.

WTF!!! It worked!!!

I have no idea why. Maybe something in the kfx-input plugin? Maybe the Kindle file I purchased was not encrypted? Dunno, but I got what I wanted and don't wish to make a career over the DeDRM plugin issue.

Has Amazon stopped encrypting their Kindle books?
Everything I see online wrt turning Amazon Kindle content to another format talks about using Calibre and the DeDRM plugin. I didn't seem to need DeDRM!

Just thought I'd pass this on.
Would be happy to hear an explanation if someone has one.

Rich

ElleKayEm · 2020-04-04T22:13:18Z

As I said in the other issue, that book must have already been DRM-free. Some publishers allow their books to be sold without it. Most of the big publisher still require it though.

racoco · 2020-04-05T02:18:35Z

ElleKayEm - thank you.

ghost · 2020-10-20T05:42:13Z

For anyone still trying to get this to work. Installing Calibre from the tarball worked for me on Fedora 32.

Download the calibre tarball. https://download.calibre-ebook.com/3.48.0/

Then install it. Change the path of course.

sudo mkdir -p /opt/calibre && sudo rm -rf /opt/calibre/* && sudo tar xvf /path/to/downloaded/calibre-tarball.txz -C /opt/calibre && sudo /opt/calibre/calibre_postinstall

Then go through the process of installing the deDRM plugin. I installed version 6.8.

ElleKayEm · 2020-10-20T13:13:51Z

You can go up to calibre 4.23 with DeDRM 6.8.

strarsis · 2020-11-02T12:17:36Z

+1, this bug occurs with latest Calibre 5.x! Can't use DeDRM in Calibre 5.4.2.

ElleKayEm · 2020-11-02T13:20:25Z

@strarsis
Yes, it is known. Calibre 5.x compatibility is being worked on. In the meantime, use calibre 4.23.

apprenticeharper · 2020-11-27T19:57:37Z

Try the 7.0.0 betas

ElleKayEm mentioned this issue Mar 16, 2020

DeDRM plugin failed to install #1019

Closed

ElleKayEm mentioned this issue Mar 24, 2020

Invalid sintax error #1035

Closed

This was referenced Aug 17, 2020

Invalid syntax #1180

Closed

ZIP Import Error #1116

Open

Can't install DRM Plugin on Calibre #1192

Closed

apprenticeharper closed this as completed Nov 27, 2020

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Unable to load DeDRM_calibre_plugin with calibre 4.1 on Fedora 31 #928

Unable to load DeDRM_calibre_plugin with calibre 4.1 on Fedora 31 #928

xjvs commented Oct 31, 2019

j-howell commented Oct 31, 2019 •

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xjvs commented Nov 1, 2019 •

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rrix commented Nov 3, 2019

audetto commented Nov 7, 2019

audetto commented Nov 7, 2019

voland66 commented Nov 24, 2019

acdingman commented Dec 4, 2019 •

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mlturner88 commented Dec 23, 2019

hevanaa commented Dec 23, 2019

hevanaa commented Dec 23, 2019

rrix commented Dec 31, 2019

hevanaa commented Dec 31, 2019 •

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rrix commented Jan 7, 2020

racoco commented Apr 4, 2020

ElleKayEm commented Apr 4, 2020

racoco commented Apr 5, 2020

ghost commented Oct 20, 2020

ElleKayEm commented Oct 20, 2020

strarsis commented Nov 2, 2020

ElleKayEm commented Nov 2, 2020

apprenticeharper commented Nov 27, 2020

Unable to load DeDRM_calibre_plugin with calibre 4.1 on Fedora 31 #928

Unable to load DeDRM_calibre_plugin with calibre 4.1 on Fedora 31 #928

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xjvs commented Oct 31, 2019

j-howell commented Oct 31, 2019 • edited Loading

xjvs commented Nov 1, 2019 • edited Loading

rrix commented Nov 3, 2019

audetto commented Nov 7, 2019

audetto commented Nov 7, 2019

voland66 commented Nov 24, 2019

acdingman commented Dec 4, 2019 • edited Loading

mlturner88 commented Dec 23, 2019

hevanaa commented Dec 23, 2019

hevanaa commented Dec 23, 2019

rrix commented Dec 31, 2019

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rrix commented Jan 7, 2020

racoco commented Apr 4, 2020

ElleKayEm commented Apr 4, 2020

racoco commented Apr 5, 2020

ghost commented Oct 20, 2020

ElleKayEm commented Oct 20, 2020

strarsis commented Nov 2, 2020

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