It is always better to catch exception and raise it with a detailed information, difference between just raising and raising caught exception.

With rising e:
.. code:: python
    Traceback (most recent call last):
        File "<stdin>", line 5, in <module>
        File "<stdin>", line 2, in <module>
     FileNotFoundError: [Errno 2] No such file or directory: 'test'

Just rising:
.. code:: python
    Traceback (most recent call last):
       File "<stdin>", line 2, in <module>
    FileNotFoundError: [Errno 2] No such file or directory: 'test'