code: def test_multiple_pip_installs(start_cluster, monkeypatch):
      """Test that multiple pip installs don't interfere with each other."""
      monkeypatch.setenv("RUNTIME_ENV_RETRY_TIMES", "0")
      cluster, address = start_cluster
  
      if sys.platform == "win32" and "ray" not in address:
          pytest.skip(
              "Failing on windows, as python.exe is in use during deletion attempt."
          )
  
      ray.init(
          address,
          runtime_env={
              "pip": ["pip-install-test"],
              "env_vars": {"TEST_VAR_1": "test_1"},
          },
      )
  
      @ray.remote
      def f():
          return True
  
      @ray.remote(
          runtime_env={
              "pip": ["pip-install-test"],
              "env_vars": {"TEST_VAR_2": "test_2"},
          }
      )
      def f2():
          return True
  
      @ray.remote(
          runtime_env={
              "pip": ["pip-install-test"],
              "env_vars": {"TEST_VAR_3": "test_3"},
          }
      )
      def f3():
          return True
  
      assert all(ray.get([f.remote(), f2.remote(), f3.remote()]))
  
file_path: ray/python/ray/tests/test_runtime_env_conda_and_pip_4.py
imports: import os
  import pytest
  import sys
  from ray._private.runtime_env.pip import PipProcessor
  import ray
label_desc: Use image node_id 2 for calling a global function with example usage: test_multiple_pip_installs(start_cluster, monkeypatch) and returns: True, True, True