What command is needed to automatically run unittest in Python?

The command needed to automatically run unittest in Python is executed using the syntax python -m unittest. This command leverages Python's module execution capability, where -m indicates that you want to run a module as a script.

When you use python -m unittest, Python invokes the unittest module, which finds and runs all the test cases defined in any files that start with test_ or end with _test.py within the current directory and its subdirectories. This makes it convenient to run tests without needing to specify the precise location of the test files or directly calling the test script, thus streamlining the testing process.

The other options provided do not constitute valid commands for running unittest in Python. They may resemble correct commands but do not utilize the proper syntax or structure required by the Python interpreter to invoke the unittest framework effectively.