from __future__ import division
def get_inverse_ub_matrix_from_xparm(handle):
  """Get the inverse_ub_matrix from an xparm file handle

  Params:
      handle The file handle

  Returns:
      The inverse_ub_matrix

  """
  from scitbx import matrix
  return matrix.sqr(handle.unit_cell_a_axis +
                    handle.unit_cell_b_axis +
                    handle.unit_cell_c_axis)

def get_ub_matrix_from_xparm(handle):
  """Get the ub_matrix from an xparm file handle

  Params:
      handle The file handle

  Returns:
      The ub_matrix

  """
  return get_inverse_ub_matrix_from_xparm(handle).inverse()

def get_unit_cell_from_xparm(handle):
  """Get the unit_cell object from an xparm file handle

  Params:
      handle The file handle

  Returns:
      The unit cell object

  """
  from cctbx import uctbx
  return uctbx.unit_cell(parameters=handle.unit_cell)

def get_space_group_type_from_xparm(handle):
  """Get the space group tyoe object from an xparm file handle

  Params:
      handle The file handle

  Returns:
      The space group type object

  """
  from cctbx import sgtbx
  return sgtbx.space_group_type(sgtbx.space_group(
      sgtbx.space_group_symbols(handle.space_group).hall()))