Ulauncher: no module named 'ulauncher'

[andersfylling]

Steps to reproduce

1. open a terminal
2. write ulauncher
3. hit enter

Current behavior

outputs the following error:

➜ ulauncher
Traceback (most recent call last):
  File "/usr/bin/ulauncher", line 27, in <module>
    from ulauncher.main import main
ModuleNotFoundError: No module named 'ulauncher'

Expected behavior

no error to happen and ulauncher to start

Environment

Ulauncher version: 5.9.0-1
Linux distro: arch 5.9.11-arch2-1
Desktop environment: sway 1.5.1

Logs

➜ ulauncher -v
Traceback (most recent call last):
  File "/usr/bin/ulauncher", line 27, in <module>
    from ulauncher.main import main
ModuleNotFoundError: No module named 'ulauncher'

Related: #556

[genghispirate]

had the same problem a few hours ago,
I reinstalled ulauncher (through AUR on archlinux) it started working again, and kept all configs and extensions

[pakro]

had the same problem a few hours ago,
I reinstalled ulauncher (through AUR on archlinux) it started working again, and kept all configs and extensions

Reinstalled but having still the same issue. Did you install ulauncher-git or ulauncher?

[genghispirate]

had the same problem a few hours ago,
I reinstalled ulauncher (through AUR on archlinux) it started working again, and kept all configs and extensions

Reinstalled but having still the same issue. Did you install ulauncher-git or ulauncher?

Ulauncher, I ran yay -S ulauncher

[AlejandroME]

The issue seems to be caused by the bunch of Python libs that got updated today (December 2nd):

[2020-12-02T05:06:56-0500] [ALPM] upgraded python-anytree (2.8.0-1 -> 2.8.0-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-asn1crypto (1.4.0-1 -> 1.4.0-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-msgpack (1.0.0-1 -> 1.0.0-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-chardet (3.0.4-5 -> 3.0.4-7)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-idna (2.10-1 -> 2.10-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-requests (2.24.0-1 -> 2.25.0-1)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-cachecontrol (0.12.6-1 -> 0.12.6-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pycparser (2.20-1 -> 2.20-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-cffi (1.14.3-1 -> 1.14.4-1)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-click (7.1.2-1 -> 7.1.2-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-configobj (5.0.6-7 -> 5.0.6-9)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-contextlib2 (0.6.0.post1-1 -> 0.6.0.post1-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-cryptography (3.2.1-1 -> 3.2.1-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-distlib (0.3.1-1 -> 0.3.1-2)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-distutils-extra (2.39-5 -> 2.39-8)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-fido2 (0.8.1-1 -> 0.8.1-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-webencodings (0.5.1-4 -> 0.5.1-6)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-html5lib (1.1-4 -> 1.1-5)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-levenshtein (0.12.0-8 -> 0.12.0-10)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-lxml (4.6.1-1 -> 4.6.2-1)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-toml (0.10.2-1 -> 0.10.2-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pep517 (0.9.1-1 -> 0.9.1-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-progress (1.5-3 -> 1.5-5)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-retrying (1.3.3-7 -> 1.3.3-9)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-resolvelib (0.5.1-1 -> 0.5.2-1)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pyopenssl (19.1.0-2 -> 20.0.0-1)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pip (20.2-1 -> 20.2-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-psutil (5.7.3-1 -> 5.7.3-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pycups (2.0.1-1 -> 2.0.1-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pycurl (7.43.0.6-1 -> 7.43.0.6-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pyenchant (3.1.1-2 -> 3.1.1-4)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pygments (2.7.2-1 -> 2.7.2-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pyinotify (0.9.6-7 -> 0.9.6-9)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pymongo (3.11.0-1 -> 3.11.1-1)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pypandoc (1.5-2 -> 1.5-4)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pyscard (2.0.0-1 -> 2.0.0-2)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pytoml (0.1.21-4 -> 0.1.21-6)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pyusb (1.1.0-1 -> 1.1.0-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-pyxdg (0.26-6 -> 0.26-8)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-regex (2020.11.13-1 -> 2020.11.13-2)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-urwid (2.1.1-1 -> 2.1.1-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python-websocket-client (0.57.0-1 -> 0.57.0-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python2-appdirs (1.4.4-1 -> 1.4.4-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python2-dbus (1.2.16-1 -> 1.2.16-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python2-pyparsing (2.4.7-1 -> 2.4.7-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python2-six (1.15.0-1 -> 1.15.0-3)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python2-packaging (20.4-1 -> 20.7-1)
[2020-12-02T05:06:56-0500] [ALPM] upgraded python2-psutil (5.7.3-1 -> 5.7.3-3)

This update did not only break ulauncher, but in my case my laptop got stuck in a bootloop because optimus-manager is affected by this.
mate got affected by this (crashing constantly), gpg and the Yubikey daemon got affected by this.

I rolled back this upgrade and everything went to its normal state.

[pakro]

had the same problem a few hours ago,
I reinstalled ulauncher (through AUR on archlinux) it started working again, and kept all configs and extensions

Reinstalled but having still the same issue. Did you install ulauncher-git or ulauncher?

Ulauncher, I ran yay -S ulauncher

I've deleted ~/cache/yay/ulauncher folder and reinstalled. It is working now properly again. This also worked for other python based applications. Just need to ensure that it clean builds and uses the newly updated python packages.

Thank you @genghispirate!