code: def test_set_requirements_without_cached_directory(self):
      requirements_txt_path = os.path.join(
          self.tempdir, str(uuid.uuid4())
      )
      with open(requirements_txt_path, "w") as f:
          f.write("cloudpickle==2.2.0")
      self.t_env.set_python_requirements(requirements_txt_path)
  
      def check_requirements(i):
          import cloudpickle  # noqa # pylint: disable=unused-import
  
          assert "_PYTHON_REQUIREMENTS_INSTALL_DIR" in os.environ
          return i
  
      self.t_env.create_temporary_system_function(
          "check_requirements",
          udf(
              check_requirements, DataTypes.BIGINT(), DataTypes.BIGINT()
          ),
      )
      sink_table_ddl = """
                  CREATE TABLE Results(a BIGINT, b BIGINT) WITH ('connector'='test-sink')
                  """
      self.t_env.execute_sql(sink_table_ddl)
  
      t = self.t_env.from_elements([(1, 2), (2, 5), (3, 1)], ["a", "b"])
      t.select(
          expr.call("check_requirements", t.a), t.a
      ).execute_insert("Results").wait()
  
      actual = source_sink_utils.results()
      self.assert_equals(actual, ["+I[1, 1]", "+I[2, 2]", "+I[3, 3]"])
  
imports: import os
  import shutil
  import sys
  import unittest
  import uuid
  from pyflink.table import DataTypes, TableEnvironment, EnvironmentSettings
  from pyflink.table import expressions
  from pyflink.table.udf import udf
  from pyflink.testing import source_sink_utils
  from pyflink.testing.test_case_utils import PyFlinkTestCase
label_desc: Use image node_id 2 for calling the StreamDependencyTests obj's underlying member method code with example usage: obj.test_set_requirements_without_cached_directory() and returns: i