code: def rand_mask(shape, dtype):
      return F.randn(shape) > 0
  
file_path: dgl/tests/distributed/test_dist_tensor.py
imports: import operator
  import os
  import unittest
  import backend
  import dgl
  import pytest
  from utils import create_random_graph, generate_ip_config, reset_envs
label_desc: Use image node_id 1 for calling a global function with example usage: rand_mask(shape, dtype) and returns: unknown