getting spindle speed in python

Hello everyone
I want to read spindle speed in Python, but it's giving me some errors and not lunching linuxcnc
I tried it as the documentary said but don't know why it isn't working 
I'm reading some other states at the same time, but whenever I add  spindle_speed(returns float) - spindle speed value, rpm, > 0: clockwise, < 0: counterclockwise. its giving me errors

it's giving me some errors

so what errors do you get?


[edit]
Sharing your python code might also be helpful.

  Am i writing the wrong command?

but whenever I add spindle_speed(returns float)

Not sure what version of linuxcnc you are running but you may be referring to old docs as the current attribute is 'speed' inside the 'spindle' dictionary
linuxcnc.org/docs/stable/html/config/pyt...e-spindle-dictionary

So to access the speed of spindle 0:

So you are running 2.8.x:
linuxcnc.org/docs/2.8/html/config/python...e-spindle-dictionary

The code I posted above should work.