code: def inner(self):
      from metaflow import current
  
      assert_equals(4, current.parallel.num_nodes)
      self.my_node_index = current.parallel.node_index
      assert_equals(self.my_node_index, self.input)
  
file_path: metaflow/test/core/tests/basic_parallel.py
imports: from metaflow_test import MetaflowTest, ExpectationFailed, steps, tag
label_desc: Use image node_id 2 for calling the BasicParallelTest obj's underlying member method code with example usage: obj.inner() without return types