python error when installing Xilinx Petalinux on Ubuntu 20.04

Question

I got this error while I tried to install Xilinx Petalinux on Ubuntu 20.04

dpkg-query: package 'python' is not installed and no information is available Use dpkg --info (= dpkg-deb --info) to examine archive files ERROR: You have tools don't meet the version requirements: -Detected python version is less than the expected 2.7.3

I reinstalled python several times, it didn't work out.

Answer 1

I installed petalinux on Ubuntu 20.04

I had the same issue as you describe. The issue is how petalinux installer checks for version of python using dpkg and a renaming of package python to python2.7

I resolved by ensuring I installed python2 e.g. sudo apt-get install python2.7-minimal:i386 or sudo apt-get install python2.7-minimal:amd64 (I did both by mistake!) then I tricked dpkg into thinking "python" was installed by copying the section called Package: python2.7 and renaming to:- Package: python in file /var/lib/dpkg/status

This 'hack' enables dpkg to report the installed python version for installed python2.7

The petalinux installer, when querying the version of python, now succeeds and the installation progresses.

HOWEVER there is a reported issue on how the script uses sed, so the final trick is to use a sed shim as reported on xilinx forum "PetaLinux 2018.1 Install Fails on Debian Stretch"

ok. It's a bit of a hack to convince the installer to not prematurely fail. If there are more elegant solutions I'm interested to learn them.