check_operands

sknano.core.atoms.mixins.check_operands(*atoms, size=None)

Check atom operands.

Parameters:

• *atoms –

  list of Atoms or an Atoms object.

• size (int) –

Returns:

Return type:

tuple

Raises:

• TypeError – if atoms is not a list of Atom objects or an Atoms object.
• ValueError – if len(atoms) != size.