code: def test_putget(self):
      table = "test_putget"
      diskcache_put(table, "hello", "world")
      self.assertEqual(diskcache_get(table, "hello"), "world")
      diskcache_put(table, "hello", "world2")
      self.assertEqual(diskcache_get(table, "hello"), "world2")
  
file_path: tinygrad/test/unit/test_disk_cache.py
imports: import unittest
  import pickle
  from tinygrad.helpers import diskcache_get, diskcache_put, diskcache
label_desc: Use image node_id 1 for calling the DiskCache obj's underlying member method code with example usage: obj.test_putget() without return types