Monday, January 3, 2022

[SOLVED] apt - dpkg python-rpi.gpio dependency problems

Issue

Every time i try to install something, upgrade or autoremove this error happens!

I've searched the web and tried some fixes but they don't seem to work, I don't have python2.7 installed only 3 and can't install python2 or anything because of this. I've tryed to sudo rm python-rpi.gpio_0.7.0-0.1~bpo10+4_armhf.deb but the file will keep comming. Pls I really need some help since I've got some work on my pi and don't want to get a new image

sudo apt autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  python-rpi.gpio
The following packages will be upgraded:
  python-rpi.gpio
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
18 not fully installed or removed.
Need to get 0 B/20.7 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Reading changelogs... Done
(Reading database ... 152893 files and directories currently installed.)
Preparing to unpack .../python-rpi.gpio_0.7.0-0.1~bpo10+4_armhf.deb ...
/var/lib/dpkg/info/python-rpi.gpio.prerm: 6: /var/lib/dpkg/info/python-rpi.gpio.prerm: pyclean: Too many levels of symbolic links
dpkg: warning: old python-rpi.gpio package pre-removal script subprocess returned error exit status 2
dpkg: trying script from the new package instead ...
/var/lib/dpkg/tmp.ci/prerm: 6: /var/lib/dpkg/tmp.ci/prerm: pyclean: Too many levels of symbolic links
dpkg: error processing archive /var/cache/apt/archives/python-rpi.gpio_0.7.0-0.1~bpo10+4_armhf.deb (--unpack):
 new python-rpi.gpio package pre-removal script subprocess returned error exit status 2
/var/lib/dpkg/info/python-rpi.gpio.postinst: 6: /var/lib/dpkg/info/python-rpi.gpio.postinst: pycompile: Too many levels of symbolic links
dpkg: error while cleaning up:
 installed python-rpi.gpio package post-installation script subprocess returned error exit status 2
Errors were encountered while processing:
 /var/cache/apt/archives/python-rpi.gpio_0.7.0-0.1~bpo10+4_armhf.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Some notes: I really really don't want to change the SD Card and parcially lose what I have, second I've tried sudo apt-get install -f and sudo apt update --fix-missing when i followed this guide the sudo dpkg --remove --force-remove --reinstreq command was showing this error dpkg: error: unknown force/refuse option 'remove'


Solution

As it turns out I still had remainnings of Python2 and Python3 binaries and those were not linked properly by the OS, this means that Python3 was linked to Python2 and vice-versa.
To get it working I had to:

  • Uninstall the Python2 dependencies
  • Get the link working correctly
  • Reinstall Python2 with wget
  • Verify if all links are working correctly (for Raspbian this means):
    • python --version links to Python2
    • python2 --version links to Python2
    • python3 --version links to Python3


Answered By - André Clérigo
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