"""A module to manipulate symbolic objects with indices including tensors

"""
from .indexed import IndexedBase, Idx, Indexed
from .index_methods import get_contraction_structure, get_indices
from .array import (MutableDenseNDimArray, ImmutableDenseNDimArray,
    MutableSparseNDimArray, ImmutableSparseNDimArray, NDimArray, tensorproduct,
    tensorcontraction, derive_by_array, permutedims, Array, DenseNDimArray,
    SparseNDimArray,)