code: def isspmatrix_csc(x):
      """Is x of csc_matrix type?
  
      Parameters
      ----------
      x
          object to check for being a csc matrix
  
      Returns
      -------
      bool
          True if x is a csc matrix, False otherwise
  
      Examples
      --------
      >>> from scipy.sparse import csc_matrix, isspmatrix_csc
      >>> isspmatrix_csc(csc_matrix([[5]]))
      True
  
      >>> from scipy.sparse import csc_matrix, csr_matrix, isspmatrix_csc
      >>> isspmatrix_csc(csr_matrix([[5]]))
      False
      """
      return isinstance(x, csc_matrix)
  
file_path: catboost/contrib/python/scipy/py2/scipy/sparse/csc.py
imports: from __future__ import division, print_function, absolute_import
  import numpy
  from .base import spmatrix
  from ._sparsetools import csc_tocsr
  from .None import _sparsetools
  from .sputils import upcast, isintlike, IndexMixin, get_index_dtype
  from .compressed import _cs_matrix
label_desc: Use image node_id 1 for calling a global function with example usage: isspmatrix_csc(x) and returns: isinstance