code: def test_register_class(ray_start_2_cpus):
      # Check that putting an object of a class that has not been registered
      # throws an exception.
      class TempClass:
          pass
  
      ray.get(ray.put(TempClass()))
  
      # Test passing custom classes into remote functions from the driver.
      @ray.remote
      def f(x):
          return x
  
      class Foo:
          def __init__(self, value=0):
              self.value = value
  
          def __hash__(self):
              return hash(self.value)
  
          def __eq__(self, other):
              return other.value == self.value
  
      foo = ray.get(f.remote(Foo(7)))
      assert foo == Foo(7)
  
      regex = re.compile(r"\d+\.\d*")
      new_regex = ray.get(f.remote(regex))
      # This seems to fail on the system Python 3 that comes with
      # Ubuntu, so it is commented out for now:
      # assert regex == new_regex
      # Instead, we do this:
      assert regex.pattern == new_regex.pattern
  
      class TempClass1:
          def __init__(self):
              self.value = 1
  
      # Test returning custom classes created on workers.
      @ray.remote
      def g():
          class TempClass2:
              def __init__(self):
                  self.value = 2
  
          return TempClass1(), TempClass2()
  
      object_1, object_2 = ray.get(g.remote())
      assert object_1.value == 1
      assert object_2.value == 2
  
      # Test exporting custom class definitions from one worker to another
      # when the worker is blocked in a get.
      class NewTempClass:
          def __init__(self, value):
              self.value = value
  
      @ray.remote
      def h1(x):
          return NewTempClass(x)
  
      @ray.remote
      def h2(x):
          return ray.get(h1.remote(x))
  
      assert ray.get(h2.remote(10)).value == 10
  
      # Test registering multiple classes with the same name.
      @ray.remote(num_returns=3)
      def j():
          class Class0:
              def method0(self):
                  pass
  
          c0 = Class0()
  
          class Class0:
              def method1(self):
                  pass
  
          c1 = Class0()
  
          class Class0:
              def method2(self):
                  pass
  
          c2 = Class0()
  
          return c0, c1, c2
  
      results = []
      for _ in range(5):
          results += j.remote()
      for i in range(len(results) // 3):
          c0, c1, c2 = ray.get(results[(3 * i) : (3 * (i + 1))])
  
          c0.method0()
          c1.method1()
          c2.method2()
  
          assert not hasattr(c0, "method1")
          assert not hasattr(c0, "method2")
          assert not hasattr(c1, "method0")
          assert not hasattr(c1, "method2")
          assert not hasattr(c2, "method0")
          assert not hasattr(c2, "method1")
  
      @ray.remote
      def k():
          class Class0:
              def method0(self):
                  pass
  
          c0 = Class0()
  
          class Class0:
              def method1(self):
                  pass
  
          c1 = Class0()
  
          class Class0:
              def method2(self):
                  pass
  
          c2 = Class0()
  
          return c0, c1, c2
  
      results = ray.get([k.remote() for _ in range(5)])
      for c0, c1, c2 in results:
          c0.method0()
          c1.method1()
          c2.method2()
  
          assert not hasattr(c0, "method1")
          assert not hasattr(c0, "method2")
          assert not hasattr(c1, "method0")
          assert not hasattr(c1, "method2")
          assert not hasattr(c2, "method0")
          assert not hasattr(c2, "method1")
  
imports: import collections
  import io
  import logging
  import re
  import string
  import sys
  import weakref
  from dataclasses import make_dataclass
  import numpy
  import pytest
  from numpy import log
  import ray
  import ray.cluster_utils
label_desc: Use image node_id 8 for calling a global function with example usage: test_register_class(ray_start_2_cpus) and returns: x, TempClass1,  TempClass2, NewTempClass, ray, c0,  c1,  c2, c0,  c1,  c2, hash, unknown