Calibre doesn't start in linux Manjaro

[texsit]

Dear,
after some update on Manjaro linux, Calibre doesn't start.
If I run from command line I have the following error:

Spoiler:

Traceback (most recent call last):
File "/usr/bin/calibre", line 20, in <module>
sys.exit(calibre())
File "/usr/lib/calibre/calibre/gui_launch.py", line 72, in calibre
from calibre.gui2.main import main
File "/usr/lib/calibre/calibre/gui2/__init__.py", line 16, in <module>
from PyQt5.Qt import (
ImportError: cannot import name 'QT_VERSION' from 'PyQt5.Qt' (/home/luca/.local/lib/python3.8/site-packages/PyQt5/Qt.so)

I have pyton version: Python 3.8.6

Package Version
----------------------------- ------------
alabaster 0.7.12
apparmor 3.0.0
appdirs 1.4.4
apsw 3.33.0.post1
argh 0.26.2
argon2-cffi 20.1.0
asn1crypto 1.4.0
astroid 2.4.2
atomicwrites 1.4.0
attrs 20.3.0
autopep8 1.5.4
Babel 2.8.1
backcall 0.2.0
bauh 0.9.8
beautifulsoup4 4.9.3
black 20.8b1
bleach 3.2.1
breezy 3.1.0
btrfsutil 5.9
CacheControl 0.12.6
catfish 1.4.13
ceph 1.0.0
ceph-volume 1.0.0
cephfs 2.0.0
cephfs-shell 0.0.1
certifi 2020.6.20
cffi 1.14.3
chardet 3.0.4
click 7.1.2
cloudpickle 1.2.2
colorama 0.4.4
configobj 5.0.6
contextlib2 0.6.0.post1
cryptography 3.2.1
css-parser 1.0.6
cssselect 1.1.0
cupshelpers 1.0
cycler 0.10.0
Cython 0.29.21
decorator 4.4.2
defusedxml 0.6.0
diff-match-patch 20200713
distlib 0.3.1
distro 1.5.0
dnspython 1.16.0
docopt 0.6.2
docutils 0.16
dulwich 0.20.11
entrypoints 0.3
fastimport 0.9.8
feedparser 5.2.1
flake8 3.8.4
future 0.18.2
gmpy2 2.1.0b5
greenlet 0.4.17
gufw 20.4.0
h5py 3.1.0
helpdev 0.7.1
html2text 2020.1.16
html5-parser 0.4.9
html5lib 1.1
idna 2.10
ifaddr 0.1.7
imagesize 1.2.0
importlib-metadata 2.0.0
intervaltree 3.1.0
ipykernel 5.3.4
ipython 7.19.0
ipython-genutils 0.1.0
ipywidgets 7.5.1
isort 5.6.4
jedi 0.17.2
jeepney 0.6.0
Jinja2 2.11.2
jsonschema 3.2.0
jupyter-client 6.1.7
jupyter-console 6.2.0
jupyter-core 4.6.3
keyring 21.5.0
keyutils 0.6
kiwisolver 1.3.1
lazy-object-proxy 1.5.2
lensfun 0.3.95
LibAppArmor 3.0.0
lightdm-gtk-greeter-settings 1.2.2
lockfile 0.12.2
louis 3.15.0
lxml 4.6.1
Markdown 3.3.3
MarkupSafe 1.1.1
matplotlib 3.3.3
mccabe 0.6.1
mechanize 0.4.5
menulibre 2.2.1
mercurial 5.6
mistune 0.8.4
more-itertools 8.6.0
mpmath 1.1.0
msgpack 1.0.0
mugshot 0.4.2
mypy-extensions 0.4.3
nbconvert 5.6.1
nbformat 5.0.6
neovim 0.3.1
netifaces 0.10.9
netsnmp-python 1.0a1
notebook 6.1.4
npyscreen 4.10.5
numpy 1.19.4
numpydoc 1.1.0
ordered-set 4.0.2
packaging 20.4
pacman-mirrors 4.16.4
pandas 1.1.5
pandas-datareader 0.9.0
pandocfilters 1.4.3
parso 0.7.0
pathspec 0.8.1
pathtools 0.1.2
patiencediff 0.2.1
pep517 0.9.1
pexpect 4.8.0
pickleshare 0.7.5
Pillow 7.2.0
pip 20.3.3
pluggy 0.13.1
ply 3.11
progress 1.5
prometheus-client 0.8.0
prompt-toolkit 3.0.8
psutil 5.7.3
ptyprocess 0.6.0
pyaml 20.4.0
pycairo 1.20.0
pychm 0.8.6
pycodestyle 2.6.0
pycparser 2.20
pycups 2.0.1
pycurl 7.43.0.6
pydocstyle 5.1.1
pyflakes 2.2.0
Pygments 2.7.2
PyGObject 3.38.0
pylint 2.6.0
pyls-black 0.4.6
pyls-spyder 0.3.0
pynvim 0.4.2
PyOpenGL 3.1.5
pyOpenSSL 19.1.0
pyparsing 2.4.7
PyQt3D 5.15.2
PyQt5 5.12.3
PyQt5-sip 12.8.1
PyQtChart 5.15.2
PyQtDataVisualization 5.15.2
PyQtPurchasing 5.15.2
PyQtWebEngine 5.12.1
pyrsistent 0.17.3
pysmbc 1.0.23
python-dateutil 2.8.1
python-distutils-extra 2.39
python-jsonrpc-server 0.4.0
python-language-server 0.36.2
pytoml 0.1.21
pytz 2020.4
pyxdg 0.26
PyYAML 5.3.1
pyzmq 19.0.1
QDarkStyle 2.8.1
Qt.py 1.3.2
QtAwesome 0.6.0
qtconsole 5.0.1
QtPy 1.9.0
rados 2.0.0
rbd 2.0.0
regex 2020.11.13
reportlab 3.5.55
requests 2.24.0
resolvelib 0.5.1
retrying 1.3.3
rgw 2.0.0
rope 0.18.0
scipy 1.5.4
SecretStorage 3.2.0
Send2Trash 1.5.0
setuptools 50.3.2
sip 4.19.24
six 1.15.0
snowballstemmer 2.0.0
sortedcontainers 2.3.0
soupsieve 2.0.1
Sphinx 3.3.1
sphinxcontrib-applehelp 1.0.2
sphinxcontrib-devhelp 1.0.2
sphinxcontrib-htmlhelp 1.0.3
sphinxcontrib-jsmath 1.0.1
sphinxcontrib-qthelp 1.0.3
sphinxcontrib-serializinghtml 1.1.4
spyder 4.2.1
spyder-kernels 1.10.1
sympy 1.6.2
team 1.0
terminado 0.9.1
terminator 1.92
testpath 0.4.4
textdistance 4.2.0
three-merge 0.1.1
toml 0.10.2
tornado 6.1
traitlets 4.3.3
typed-ast 1.4.1
typing-extensions 3.7.4.3
udiskie 2.2.0
ufw 0.36
ujson 4.0.1
unrardll 0.1.4
urllib3 1.25.10
watchdog 0.10.3
wcwidth 0.2.5
webencodings 0.5.1
widgetsnbextension 3.5.1
wrapt 1.12.1
wurlitzer 2.0.0
xlrd 1.2.0
yapf 0.30.0
youtube-dl 2020.11.29
zeroconf 0.28.6
zipp 3.4.0

Please I'm not so expert ... can you help me?

[kcarscadden]

I run Calibre 5.6 on Manjaro Linux arm aarch64 on a Raspberry Pi 4 with no problems.

It might help if you give the version of Manjaro Linux you are running, on what hardware, and the version of Calibre.

[binaryhermit]

And Calibre 4.7.2 works fine on Manjaro ARM (I believe on the testing branch) on a Pinebook Pro

EDIT: 5.7.2, I had a minor brainfart

[kovidgoyal]

You appear to be using either a distro or hand compiled python/calibre. Dont do that. use the official binaries and you will be fine.