Hello Sir,
  It's Biswadeep from India. I'm an electronics engineering student currently persuading my study on electronic transport in nano devices.  My recent area of focus is to simulate the system and lead structure of Carbon nano tube. So far my approach has not given me the edge . As i'm new with this specific tube structure , I'm failing to come up with the python code needed to simulate CNT. So I need a guidance on how to do it. If possible any source link to find code for such tube structures would definitely help in this regard.
  So I request you to help me with your guidance.
Regards,
Biswadeep Upadhyay