Class PIPERDistanceConstraintPair

Initialize with:
rec_asl {string} REQUIRED ASL espression corresponding to eactly
   one residue on the receptor
lig_asl {string} REQUIRED ASL espression corresponding to eactly
   one residue on the ligand
dmin {float} minimum allowed distance between any two atoms on the
   residues defined by rec_asl and lig_asl
dmax {float} maximum allowed distance between any two atoms on the
   residues defined by rec_asl and lig_asl

Overrides: object.__init__

str(x)

Overrides: object.__str__

(inherited documentation)

This must be called to set link the asl expresion given in the 
initializer to a set of structures
rec_st { schrodinger.Structure} receptor structure
lig_st { schrodinger.Structure} receptor structure
If the ASL expression provided in the initializer does not correspond 
   to exactly one residue in rec_st and lig_st respectively than
   a RuntimeError is raised

Return the dictionary that will be used to create the piper-backend-formatted json file. This format is different than the json format used to pass constraint objects to the schrodinger-wrapper for Prime as that json file must include distance and energy-based constraints.