code: def n_items(self, reordered_shape):
      return functools.reduce(lambda x, y: x * y, reordered_shape, 1)
  
imports: import functools
  import sys
  import pytest
  import numpy
  import tvm
  import tvm.testing
  from tvm import te
  from tvm.tir.stmt_functor import post_order_visit
  from tvm.driver.build_module import schedule_to_module
label_desc: Use image node_id 1 for calling the TestCompareAgainstExplicitReshape obj's underlying member method code with example usage: obj.n_items(reordered_shape) and returns: functools