text: # MIT License
  #
  # Copyright (c) 2017 Anders S. Christensen
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  
  from __future__ import division, absolute_import, print_function
  
  import numpy as np
  
  import ase
  from ase.io import read
  from ase.db import connect
  
  from .dataprovider import DataProvider
  
  class XYZDataProvider(DataProvider):
  
      def add_structures(self, xyz_filenames):
  
          self.compounds = connect(self.name+ ".db")
  
          for i, xyz_filename in enumerate(xyz_filenames):
              print(i, xyz_filename, self.properties[i])
              compound = read(xyz_filename)
              self.compounds.write(compound)
   
  