code: def isspmatrix_csc(x):
      """Checks if a given matrix is of CSC format.
  
      Returns:
          bool: Returns if ``x`` is :class:`cupyx.scipy.sparse.csc_matrix`.
  
      """
      return isinstance(x, csc_matrix)
  
imports: import cupy
  from cupy_backends.cuda.api import driver
  from cupy_backends.cuda.api import runtime
  import cupyx.scipy.sparse
  from cupyx.scipy.sparse import _base
  from cupyx.scipy.sparse import _compressed
label_desc: Use image node_id 1 for calling a global function with example usage: isspmatrix_csc(x) and returns: isinstance