[SOLVED] Issue when trying to add Python3 and upgrading Raspberry (bootloader issue)

Navio / Edge Flight stack
1

Hello everyone,

We are trying to install Python 3 on our Raspberry Pi 3 Model B, using apt-get, here are some results :

sudo apt-get install python3 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: python-picamera : Depends: libraspberrypi0 but it is not going to be installed python3 : Depends: python3.4 (>= 3.4.2-0) but it is not going to be installed Depends: python3-minimal (= 3.4.2-2) but it is not going to be installed Depends: libpython3-stdlib (= 3.4.2-2) but it is not going to be installed Depends: dh-python but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

It seems that libraspberrypi0 is missing. When trying to do the apt-get -f install command for fixing the problem, the result is the following :

Unpacking raspberrypi-bootloader (1.20161215-1) ... dpkg: error processing archive /var/cache/apt/archives/raspberrypi-bootloader_1.20161215-1_armhf.deb (--unpack): trying to overwrite '/boot/fixup_cd.dat', which is also in package raspberrypi-bootloader-emlid 1.3 dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Preparing to unpack .../libraspberrypi0_1.20161215-1_armhf.deb ... Unpacking libraspberrypi0 (1.20161215-1) ... dpkg: error processing archive /var/cache/apt/archives/libraspberrypi0_1.20161215-1_armhf.deb (--unpack): trying to overwrite '/opt/vc/lib/libmmal_core.so', which is also in package raspberrypi-userspace-emlid 1.6 dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/raspberrypi-bootloader_1.20161215-1_armhf.deb /var/cache/apt/archives/libraspberrypi0_1.20161215-1_armhf.deb E: Sub-process /usr/bin/dpkg returned an error code (1)

Looks like we cannot overwrite on the current bootloader (we are using the OS given on the EMLID Documentation). We need Python 3 to perform some command for image processing algorithms, but we don’t really want to rebuild a new image for the Raspberry.

Any help would be highly appreciated !!
Thank you

2

That is intentional.

I do want to point out that it’s very difficult to help you out unless you provide us with the info that is requested when you create a topic. Please, add this information:

  1. Image and ArduPilot version.
  2. Detailed problem description. How does expected behavior differ from the observed one?
  3. Your step by step actions.

Either way, I guess the easiest solution will be using the newest beta. It works fine with Python 3 (we’ll add it per default in the Release).

For now, I suggest this:

  1. Flash the newest beta
  2. sudo apt-get update && sudo apt-get install python3 python3-pip
  3. pip3 install --user picamera it’s better to use Python tools rather than distro tools
3

Hello George,

Thank you very much for the reply and your advices! Sorry for my bad description

Actually we did exactly the easiest solution you’ve suggested, and that works well. :slight_smile:

Thank you again,
Lucas