NiDaqmx python read counter on usb-6003

Dear all

I try to use usb-6003 get counter from Signal Generator

I use python and NiDaqmx , but i don't know how to use NiDaqmx function

I use the NiDaqmx  sample can read AI0 ~ AI9

But i can't read Dev1/ctr0

What class and function to use ? 

please help