[New-bugs-announce] [issue38642] python3.7.3 seems to cause add-apt-repository to rejct or not find gi library

[Marco Ippolito]

New submission from Marco Ippolito <ippolito.marco at gmail.com>:

Following the indications found here: https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-using-the-repository 
I was trying to install Docker Engine in Ubuntu 18.04.02 Server Edition.

The first installation's steps went fine but I encountered this error message:

    (base) marco at pc:~$ sudo add-apt-repository \ 
    > "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
    > $(lsb_release -cs) \
    > stable"
    Traceback (most recent call last):
      File "/usr/bin/add-apt-repository", line 11, in <module>
        from softwareproperties.SoftwareProperties import SoftwareProperties, 
    shortcut_handler
      File "/usr/lib/python3/dist-packages/softwareproperties
    /SoftwareProperties.py", line 67, in <module>
        from gi.repository import Gio
      File "/usr/lib/python3/dist-packages/gi/__init__.py", line 42, in 
    <module>
        from . import _gi
    ImportError: cannot import name '_gi' from 'gi' (/usr/lib/python3/dist-
    packages/gi/__init__.py)

But import gi in python3 works fine:

    (base) marco at pc:~$ python3
    Python 3.7.3 (default, Mar 27 2019, 22:11:17) 
    [GCC 7.3.0] :: Anaconda, Inc. on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import gi
    >>> 


After changing the first line of /usr/bin/add-apt-repository in order to point to 3.6 version :  #!/usr/bin/python3.6 everything went fine: 

    (base) marco at pc:~$ sudo add-apt-repository \
    >    "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
    >    $(lsb_release -cs) \
    >    stable"
    Hit:1 http://gb.archive.ubuntu.com/ubuntu bionic InRelease
    Get:2 https://download.docker.com/linux/ubuntu bionic InRelease [64.4 kB]                                                            
    Get:3 http://gb.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 
    kB]                                                         
    Get:4 http://gb.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6
     kB]
    Get:5 https://download.docker.com/linux/ubuntu bionic/stable amd64    
    Packages [9594 B]
    Get:6 http://gb.archive.ubuntu.com/ubuntu bionic-updates/universe i386 
    Packages [985 kB]  
    Get:7 http://gb.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 
    Packages [1017 kB]
    Hit:8 http://apt.postgresql.org/pub/repos/apt bionic-pgdg InRelease                                                                                                                                        
    Hit:9 http://ppa.launchpad.net/certbot/certbot/ubuntu bionic InRelease                                                                                                                                     
    Get:10 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 
    kB]                                                                                                                               
    Fetched 2328 kB in 11s (217 kB/s)                                                                                                                                                                          
    Reading package lists... Done

    (base) marco at pc:~$ sudo apt-get update
    Hit:1 http://security.ubuntu.com/ubuntu bionic-security InRelease
    Hit:2 http://apt.postgresql.org/pub/repos/apt bionic-pgdg InRelease
    Hit:3 http://gb.archive.ubuntu.com/ubuntu bionic InRelease
    Hit:4 http://gb.archive.ubuntu.com/ubuntu bionic-updates InRelease               
    Hit:5 http://gb.archive.ubuntu.com/ubuntu bionic-backports InRelease             
    Hit:6 http://ppa.launchpad.net/certbot/certbot/ubuntu bionic InRelease
    Hit:7 https://download.docker.com/linux/ubuntu bionic InRelease
    Reading package lists... Done

    (base) marco at pc:~$ sudo apt-get install docker-ce docker-ce-cli 
    containerd.io
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    The following additional packages will be installed:
      aufs-tools cgroupfs-mount pigz
    The following NEW packages will be installed
      aufs-tools cgroupfs-mount containerd.io docker-ce docker-ce-cli pigz
    0 to upgrade, 6 to newly install, 0 to remove and 0 not to upgrade.
    Need to get 85.6 MB of archives.
    After this operation, 384 MB of additional disk space will be used.
    Do you want to continue? [Y/n] Y

So it seems that python3.7.3 has something which causes add-apt-repository to reject/not find gi library

----------
messages: 355714
nosy: Marco Ippolito
priority: normal
severity: normal
status: open
title: python3.7.3 seems to cause add-apt-repository to rejct or not find gi library
type: compile error
versions: Python 3.7

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38642>
_______________________________________