code: def inv(a):
      """
      Compute the inverse of a matrix with LU decomposition and
      forward / backward substitutions.
  
      Parameters
      ----------
      a : array_like
          Square matrix to be inverted.
  
      Returns
      -------
      ainv : Array
          Inverse of the matrix `a`.
      """
      return solve(a, eye(a.shape[0], chunks=a.chunks[0][0]))
  
imports: from __future__ import annotations
  import operator
  import warnings
  from functools import partial
  from numbers import Number
  import numpy
  import tlz
  from dask.array.core import Array, concatenate, dotmany, from_delayed
  from dask.array.creation import eye
  from dask.array.random import RandomState, default_rng
  from dask.array.utils import array_safe, meta_from_array, solve_triangular_safe, svd_flip
  from dask.base import tokenize, wait
  from dask.blockwise import blockwise
  from dask.delayed import delayed
  from dask.highlevelgraph import HighLevelGraph
  from dask.utils import apply, derived_from
label_desc: Use image node_id 16 for calling a global function with example usage: inv(a) and returns: solve