If you plan to use the Keepass import/export features, you need to manually install the pykeepass module.
$ pip3 install pykeepass
The above-mentioned command might fail installing the lxml package, especially on Microsoft Windows. In this case you need to install the pre-compiled binary version of lxml package.
You can find pre-compiled lxml binary packages for your platform from PyPI.
Alternatively, for Windows platform you can download binary packages from Christoph Gohlke's Unofficial Windows Binaries website. First you need to get the version of your Python interpreter and the Python platform installed:
$ python3 --version
$ python3 -c "import distutils.util; print(distutils.util.get_platform())"
For example:
$ python3 --version
Python 3.6.0
$ python3 -c "import distutils.util; print(distutils.util.get_platform())"
Win32
In this example, the lxml package to download is lxml-4.2.3-cp36-cp36m-win32.whl
Once you download the correct .whl file from the site, you can install the lxml package like this:
$ pip3 install lxml-4.2.3-cp36-cp36m-win32.whl
Then complete installation of pykeepass:
$ pip3 install pykeepass
Now you can use the import --format=keepass
and export --format=keepass
commands within Keeper Commander.