code: def isbow(vec):
      """Checks if a vector is in the sparse Gensim bag-of-words format.
  
      Parameters
      ----------
      vec : object
          Object to check.
  
      Returns
      -------
      bool
          Is `vec` in BoW format.
  
      """
      if scipy.sparse.issparse(vec):
          vec = vec.todense().tolist()
      try:
          id_, val_ = vec[
              0
          ]  # checking first value to see if it is in bag of words format by unpacking
          int(id_), float(val_)
      except IndexError:
          return True  # this is to handle the empty input case
      except (ValueError, TypeError):
          return False
      return True
  
imports: from __future__ import with_statement
  import logging
  import math
  from gensim import utils
  import numpy
  import scipy.sparse
  from scipy.stats import entropy
  from scipy.linalg import get_blas_funcs, triu
  from scipy.linalg.lapack import get_lapack_funcs
  from scipy.special import psi
label_desc: Use image node_id 19 for calling a global function with example usage: isbow(vec) and returns: True, True, False