def removeAlt(obj="", keep="A"):
        """
        removeAlt -- remove all alternate location-atoms not of altloc "keep" from object.
 
        input:
                obj -- the object(s) to remove the atoms frmo
                keep -- which type of alt loc to keep
 
        output: none -- removes atoms
 
        examples:
                removeAlt # remove all altLocations that aren't altloc A
                removeAlt pdbID C  # remove all but C altlocations from pdbID
        """
        if ( obj == "" ):
                obj="(all)"
 
        # select & remove all non A altlocs
        remStr = "%s and not (alt ''+%s)" % (obj, keep);
        cmd.remove(remStr);
        # reset the PDB information
        cmd.alter( obj, "alt=''")
 
cmd.extend("removeAlt", removeAlt)

Category: Script Library