Hi ,
I have been programming in python for a little bit, I am new to cctbx . My crystallography knowledge is as good as solving a few structures gives you. I have a few questions.

1) I was wondering if someone can point me to routines available from cctbx modules that can give me the "resolution" for a given index "h" "k" "l".  in any space group

2) In addition , if someone can point me in the direction of a well illustrated depiction of the derivation of the reciprocal lattice for the triclinic case , that will be very much appreciated bonus .

Thank you in advance
Hari