code: def is_sparse_vector(x):
      """x is a 2D sparse matrix with it's first shape equal to 1."""
      return sp.issparse(x) and len(x.shape) == 2 and x.shape[0] == 1
  
file_path: eli5/eli5/utils.py
imports: import numpy
  from scipy import sparse
label_desc: Use image node_id 5 for calling a global function with example usage: is_sparse_vector(x) and returns: unknown