code: def _prod(a):
      p = 1
      for x in a:
          p *= x
      return p
  
imports: import ast
  import re
  import sys
  import warnings
  from ..exceptions import DTypePromotionError
  from .multiarray import dtype, array, ndarray, promote_types
label_desc: Use image node_id 15 for calling a global function with example usage: _prod(a) and returns: p