If you are looking in emcmodule.py then that was written for Axis, but is actually available to any Python code.
Code:
andypugh@buster:~$ python
Python 2.7.16 (default, Oct 10 2019, 22:02:15)
[GCC 8.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import linuxcnc
>>> dir(linuxcnc.command)
['__class__', '__delattr__', '__doc__', '__format__', '__getattribute__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'abort', 'auto', 'brake', 'debug', 'feedrate', 'flood', 'home', 'jog', 'load_tool_table', 'maxvel', 'mdi', 'mist', 'mode', 'override_limits', 'program_open', 'rapidrate', 'reset_interpreter', 'serial', 'set_adaptive_feed', 'set_analog_output', 'set_block_delete', 'set_digital_output', 'set_feed_hold', 'set_feed_override', 'set_max_limit', 'set_min_limit', 'set_optional_stop', 'set_spindle_override', 'spindle', 'spindleoverride', 'state', 'task_plan_synch', 'teleop_enable', 'tool_offset', 'traj_mode', 'unhome', 'wait_complete']
There it is....
