python 3.9 compatibility
cElementTree is deprecated since 3.3 and has been removed in 3.9 [0]
Since 3.3.0, cElementTree is a dumb alias to ElementTree [1].
First reported in Gentoo [2]
cElementTree is deprecated since 3.3 and has been removed in 3.9 [0]
Since 3.3.0, cElementTree is a dumb alias to ElementTree [1].
First reported in Gentoo [2]