Dear all, 

I want to label residues with the resn+resi, and I tried the following command

one_letter ={'VAL':'V', 'ILE':'I', 'LEU':'L', 'GLU':'E', 'GLN':'Q', \
'ASP':'D', 'ASN':'N', 'HIS':'H', 'TRP':'W', 'PHE':'F', 'TYR':'Y',    \
'ARG':'R', 'LYS':'K', 'SER':'S', 'THR':'T', 'MET':'M', 'ALA':'A',    \
'GLY':'G', 'PRO':'P', 'CYS':'C'}

select CAs, obj & n. CAs
label CAs, "%s%s" % (one_letter[resn],resi)

These work find. However, when I write these in a script and the last two 
commands are written as:
    cmd.select('CAs', 'obj & n. CAs')
    cmd.label('CAs', "%s%s" % (one_letter[resn],resi))
it gives the following error:
 NameError: name 'resn' is not defined

So could anyone tell me how to correctly use the cmd.label command? 
Thank you very much in advance



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