To use this API just import the class or module needed as follows
from pthat.pthat import Axis
Then you can use it as described in the API documentation. The API will return the serial commands to be sent directly to the serial device if desired.
There is a flag auto_send_command that is a boolean. If this flag is set to true, then when any of the command methods are called it will automatically send that command to the serial device. If auto_send_command is set to false then it will not send the command and will just return the command string that needs to be sent to the serial device.
There are several examples that show how to utilize various features in the API. You can find them in the examples directory. The example SimpleAxis.py shows the basics of controlling a single motor.