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libvirt functions discovery in python

The C API of libvirt is well documented and one can easily understand how the virNetworkGetDHCPLeases function should be called. However, it is less straightforward with the python libvirt module despite the libvirt development guide. The example from the sources shows the corresponding python method is DHCPLeases 

import libvirt
conn = libvirt.open("qemu:///system")
net = conn.networkLookupByName("default")
leases = net.DHCPLeases()

But how did virNetworkGetDHCPLeases become DHCPLeases?

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virt-resize applied to Debian GNU/Linux cloud images

The Debian GNU/Linux cloud images can conveniently be used out of the box with the following:

$ wget -O debian.qcow2 https://cloud.debian.org/images/cloud/buster/20201214-484/debian-10-generic-amd64-20201214-484.qcow2
$ virt-sysprep -a debian.qcow2 --run-command 'dpkg-reconfigure --frontend=noninteractive openssh-server' --ssh-inject debian:file:$HOME/.ssh/id_rsa.pub
$ virt-install --connect qemu:///system --boot hd --name debian --memory 1024 --vcpus 1 --cpu host --disk path=$(pwd)/debian.qcow2,bus=virtio,format=qcow2 --os-type=linux --os-variant=debian10 --graphics vnc --noautoconsole
$ virsh  --connect qemu:///system domifaddr debian
 Name       MAC address          Protocol     Address
-------------------------------------------------------------------------------
 vnet0      52:54:00:3e:6f:1a    ipv4         192.168.122.84/24
$ ssh debian@192.168.122.84 df -h /
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1       1.9G  1.3G  481M  73% /

However, 2GB for the root file system may not be enough: virt-resize and virt-rescue should be used to expand it.

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