class_docstr: This class provides common dispatching and validation logic for indexing.
docstr: Convert `idx` to a valid index for an axis with a given length.
  Subclasses that need special validation can override this method.
  
  idx is assumed to be at least a 1-dimensional array-like, but can
  have no more than 2 dimensions.
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code: def _asindices(self, idx, length):
      """Convert `idx` to a valid index for an axis with a given length.
      Subclasses that need special validation can override this method.
  
      idx is assumed to be at least a 1-dimensional array-like, but can
      have no more than 2 dimensions.
      """
      try:
          x = cupy.asarray(idx, dtype=self.indices.dtype)
      except (ValueError, TypeError, MemoryError):
          raise IndexError("invalid index")
  
      if x.ndim not in (1, 2):
          raise IndexError("Index dimension must be <= 2")
  
      return x % length
  
imports: import cupy
  from cupy import _core
  from cupyx.scipy.sparse._base import isspmatrix
  from cupyx.scipy.sparse._base import spmatrix
  from cupy.cuda import device
  from cupy.cuda import runtime
  import numpy
label_desc: Use image node_id 5 for calling the IndexMixin obj's underlying member method code with example usage: obj._asindices(idx, length) and returns: unknown