My Ubuntu 21.04 came with preinstalled with python 3. I installed python 2.7 in parallel since all my programs are in python 2.7. In my modules, import dateutil
flask-mail
listener
calico
pdf-rendering
dispatch-async
gyroscope
iformatprovider
listdir
jsonstore
nested-loops
poe
columnheader
hibernate-search
edmx-designer
django-compressor
gulp
kotlin-exposed
speech-synthesis
dart-mockito
systemd-journald
xcode-previews
messagebox
option-set
inversifyjs
eclim
androidx
subscript-operator
extrapolation
wcf-data-services
itanium-abi