#!/usr/bin/env python
from sys import argv
from tsase.io.con import read_con, write_con
from tsase.io.lammps import read_lammps, write_lammps

eoncon = True
if argv[1].endswith('.con'):
    atoms = read_con(argv[1])  
else:
    atoms = read_lammps(argv[1])
    eoncon = False

if len(argv) == 3:
    outname=argv[2]
else:
    if eoncon:
        outname='lmps_pos'
    else:
        outname='pos.con'

if eoncon:
    write_lammps(outname, atoms)
else:
    write_con(outname, atoms)


