code: def diagflat(v, k=0):
      """Creates a diagonal array from the flattened input.
  
      Args:
          v (array-like): Array or array-like object.
          k (int): Index of diagonals. See :func:`cupy.diag` for detail.
  
      Returns:
          cupy.ndarray: A 2-D diagonal array with the diagonal copied from ``v``.
  
      .. seealso:: :func:`numpy.diagflat`
  
      """
      if numpy.isscalar(v):
          v = numpy.asarray(v)
  
      return cupy.diag(v.ravel(), k)
  
file_path: cupy/cupy/_creation/matrix.py
imports: import numpy
  import cupy
  from cupy import _core
label_desc: Use image node_id 2 for calling a global function with example usage: diagflat(v, k) and returns: cupy