remap keys in axis (solved)

I would like to use a button on my Xbox Controller to hide the pyVCP panel in axis. The keys for that on the keyboard are
ctrl e. The Controller can only assign a single key to a button, so I would like to hide the panel just by hitting a single key, e.g."e" on the keyboard.
That requires to change the key mapping of axis.
The threads I found here were pretty old and the links were broken quite often.
Any advice would be appreciated.

Thank you for your quick answer.
I put the code in .axisrc, but it is still ctrl e that controls the visibility
I'm using linuxcnc 2.8.
my .axisrc looks like (couldn't attach without changing the extension...):

#root_window.tk.call("wm","geometry",".","1024x768")
root_window.attributes("-fullscreen",1)
root_window.bind("<e>", commands.toggle_show_pyvcppanel)

def my_error_task(self):
error = e.poll()
while error:
kind, text = error
if kind in (linuxcnc.NML_ERROR, linuxcnc.OPERATOR_ERROR):
icon = "error"
else:
icon = "info"
notifications.add(icon, text)
ucomp["error"]=True
error = e.poll()
self.error_after = self.win.after(200, self.error_task)

def my_remove(self, widgets):
self.widgets.remove(widgets)
if len(self.cache) < 10:
widgets[0].pack_forget()
self.cache.append(widgets)
else:
widgets[0].destroy()
if len(self.widgets) == 0:
ucomp["error"]=False
self.place_forget()

LivePlotter.error_task = my_error_task
Notification.remove = my_remove

if hal_present == 1 :
ucomp = hal.component("probe.user")
ucomp.newpin("error",hal.HAL_BIT,hal.HAL_IN)
ucomp.ready()

Problem solved.
The .axisrc did not execute because I had a User_Command_File specified in my ini-File.
This stopped the .axisrc from loading and executed the file specified.

Thanks again.