[modeller_usage] meaning of "env.io.atom_files_directory"

[Sajeewa Pemasinghe <>]

Hi everyone,

I am working on the tutorial in http://salilab.org/modeller/wiki/Missing%20residues.  I have my pdb files in C:\Users\Sajeewa\Desktop\protease_project\modeller_practice directory. In the script to generate the model with all residues

# directories for input atom files
env.io.atom_files_directory = ['.', '../atom_files'] 

should this be changed as 
env.io.atom_files_directory = ['C:/Users/Sajeewa/Desktop/protease_project/modeller_practice'] ?
I don't understand what it means by 
'.', '../atom_files'
Could you please explain?

Thank you

Sajeewa Dewage