code: def is_scipy_sparse(arr):
      
  
      global _is_scipy_sparse
  
      if _is_scipy_sparse is None:
          try:
              from scipy.sparse import issparse as _is_scipy_sparse
          except ImportError:
              _is_scipy_sparse = lambda _: False
  
      return _is_scipy_sparse(arr)
docs: Check whether an array-like is a scipy.sparse.spmatrix instance.
  
      Parameters
      ----------
      arr : array-like
          The array-like to check.
  
      Returns
      -------
      boolean
          Whether or not the array-like is a scipy.sparse.spmatrix instance.
  
      Notes
      -----
      If scipy is not installed, this function will always return False.
  
      Examples
      --------
      >>> from scipy.sparse import bsr_matrix
      >>> is_scipy_sparse(bsr_matrix([1, 2, 3]))
      True
      >>> is_scipy_sparse(pd.SparseArray([1, 2, 3]))
      False
      >>> is_scipy_sparse(pd.SparseSeries([1, 2, 3]))
      False