ModuleNotFoundError: No module named 'overviewer_core'

[lostpckt-zz]

Upgraded (via apt; ubuntu 18.04.2) this morning from 0.13.90-0~overviewer1 to 0.14.2-0~overviewer1. Since the upgrade it crashes immediately with the following error message.

(from overviewer.log)

Traceback (most recent call last):
  File "/usr/bin/overviewer.py", line 38, in <module>
    from overviewer_core import util
ModuleNotFoundError: No module named 'overviewer_core'
Traceback (most recent call last):
  File "/usr/bin/overviewer.py", line 38, in <module>
    from overviewer_core import util
ModuleNotFoundError: No module named 'overviewer_core'

Let me know what further information you would like and I'm happy to supply it. It was running great before the upgrade.

(full message from apt/history.log from my 'sudo apt dist-upgrade')

Install: python3-olefile:amd64 (0.45.1-1, automatic), python3-pil:amd64 (5.1.0-1, automatic), python3-numpy:amd64 (1:1.13.3-2ubuntu1, automatic)
Upgrade: minecraft-overviewer:amd64 (0.13.90-0~overviewer1, 0.14.2-0~overviewer1), snapd:amd64 (2.38+18.04, 2.39.2+18.04)

[CounterPillow]

This is because we need separate packages for Ubuntu now, since it ships a newer version of Python than Debian.

[Ampernic]

This is because we need separate packages for Ubuntu now, since it ships a newer version of Python than Debian.

And what kind of packages are needed for this? (Sorry for my bad english)

[royalPanic]

I just downloaded this today, and I was hoping to use it on my Linux Mint laptop, only to find that I have the exact issue, with running the command simply returning an error:

Traceback (most recent call last):
  File "/usr/bin/overviewer.py", line 38, in <module>
    from overviewer_core import util
ModuleNotFoundError: No module named 'overviewer_core'

I saw this above;

This is because we need separate packages for Ubuntu now, since it ships a newer version of Python than Debian.

What do we need to do to fix this for linux users?

[CounterPillow]

You can build from source until there are pre-built packages available for you. Instructions for this can be found in the documentation.

[Jldevictoria]

I had to clone and build from master in order for it to get to work today.

[zettix]

The issue for me was the debian package wanted python3.5. On Ubuntu I typed:
dpkg -L minecraft-overviewer
And observed, for example:

/usr/lib/python3.5/dist-packages/overviewer_core/items.py

Rather than move everything over to 3.6 (my current python version), I built it.
I had to install python3 and python3-dev, I already had build-essential. See @CounterPillow 's post for the link to do this. So it worked on my Ubuntu 16.04 out of the box, but my Ubuntu 18.10 needed to be built from scratch. Until the issue is fixed with their Debian installers (following http://docs.overviewer.org/en/latest/installing/ also installs core files specific to Python 3.5) alternative means must be used. However I am very pleased with the developers for releasing a working Minecraft Overviewer with the latest Minecraft version, that is fantastic!

[Surax23]

Good day for all. Sorry for my english in advance.

I'm using Ubuntu 18.04 and met this issue some time ago. To repair this I tried to build overviewer from source, but met the same issue while building, don't remember what was exact message, something like this: "ModuleNotFoundError: No module named 'distutils.core'".
If someone trying to build overviewer from source and met the same problem just install next packages (and build-essential too like that in manual):

sudo apt-get install python3-distutils python3-pip

[IncredibleHolg]

I have a working Docker build environment based on Ubuntu 18.04:

build.Dockerfile

FROM  ubuntu:18.04
RUN apt-get -y update
RUN apt-get -y install git wget curl
RUN apt-get -y install python3 python3-pil python3-numpy
RUN apt-get -y install build-essential python3-dev devscripts

create-buildimage.sh

#!/bin/bash
docker build --rm  \
  -t mc-overview -f build.Dockerfile  .

Testimage.Dockerfile

FROM mc-overview

RUN  git clone --single-branch --branch master \
         https://github.com/overviewer/Minecraft-Overviewer.git  MOV
RUN cd MOV &&\
    ls -l &&\
    curl -O https://raw.githubusercontent.com/python-pillow/Pillow/master/src/libImaging/Imaging.h;\
    curl -O https://raw.githubusercontent.com/python-pillow/Pillow/master/src/libImaging/ImagingUtils.h ;\
    curl -O https://raw.githubusercontent.com/python-pillow/Pillow/master/src/libImaging/ImPlatform.h
RUN cd MOV && python3 setup.py build &&\
     python3 overviewer.py --verbose --version
WORKDIR /MOV

docker build -t testimage -f Testimage.Dockerfile .

This is still WIP, but whith this set of packages the build works as expected.

[CounterPillow]

the bigger issue is that we need to separate the repo into different codenames.

Currently we tell people to add the following source: deb https://overviewer.org/debian ./

Notice the ./ at the end, that's problematic. This means all users of apt will be trying to pull stuff from the same tree, and we can't make a package that works for all deb based distributions.

So realistically we have to separate this into the different codenames and warn people that they need to update their sources.list.

[chungy]

Basically you're going to need at least stretch (Debian 9), buster (Debian 10), bullseye (Debian 11), bionic (Ubuntu 18.04), and disco (Ubuntu 19.04). Maybe also xenial (Ubuntu 16.04) if people have servers still running it.

[aymericb]

I was also using Ubuntu 18.04 via Docker and got the same issue upon updating.

As a workaround (and alternative to install from source) I downgraded to using an older version of Debian.

FROM debian:stretch

[CounterPillow]

It boggles my mind people would prefer using outdated systems rather than installing 3 packages and running one command, but ok dude lmao

[SkullMasher]

Just in case here's how to building from source on debian buster (and probably all the other debian based distro like ubuntu). Might be great to temporary become root : su - or sudo su

apt install python3-pil python3-dev python3-numpy
cd /usr/local/src
git clone git://github.com/overviewer/Minecraft-Overviewer.git
cd Minecraft-Overviewer
python3 setup.py build
ln -s /usr/local/src/Minecraft-Overviewer/overviewer.py /usr/local/bin/mcoverviewer

That last command allows you to call overviewer.py from any user of the system by typing mcoverviewer

Btw thanks for the awesome project took me no time to setup and run. It's always satisfying.

[CounterPillow]

we already have build instructions