It seems like you're facing a peculiar problem where despite importing the unittest module in Python, you're unable to access or use its functions and classes. Let's try to troubleshoot this issue step by step:

1. Verify Import: Ensure you are importing the unittest module correctly. Your script should start with:

   import unittest

2. Check for Name Conflicts: Make sure there is no file or directory in your project or Python's path named unittest.py or a folder named unittest that could be shadowing the standard library's unittest module. Python might be importing that file or folder instead of the actual module from the standard library. You can check the file path of the imported module with:

   import unittest
   print(unittest.__file__)

3. Inspect Unittest Module Contents: After importing unittest, inspect its directory to confirm that it is correctly populated with the expected attributes and functions. You can list available names in the unittest module using:

   dir(unittest)

4. Python Environment: Ensure that your Python environment is clean and not corrupted. Sometimes, installations can become corrupted, and modules may not work as expected. You could try creating a new virtual environment and installing Python there to test:

   python -m venv myenv
   source myenv/bin/activate  # On Windows use `myenv\Scripts\activate`
   python -c "import unittest; print(dir(unittest))"

5. Reinstallation of Python: As a last resort, if none of the above steps reveal any issues, consider uninstalling and then reinstalling Python. Make sure to download Python from the official site and follow standard installation procedures.

6. Code Editor/IDE Checks: If you are using an IDE or a code editor, ensure that it is configured to use the correct Python interpreter where unittest is available. Sometimes, IDEs might be pointing to a different Python installation that doesn't have the required libraries or has configurations overriding standard behavior.

7. Testing a Simple Unittest Example: Write a simple test case to see if unittest works in a basic scenario:

   import unittest
   
   class TestSum(unittest.TestCase):
       def test_sum(self):
           self.assertEqual(sum([1, 2, 3]), 6, "Should be 6")
   
   if __name__ == '__main__':
       unittest.main()

Run this script directly from your command line using python your_script_name.py and see if it executes without error and runs the test.

If after following these steps the issue still persists, it might be helpful to see the exact error messages or descriptions you are encountering. This will help in pinpointing the problem more precisely.

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