Implement various kinds of error handling and resource management.

An important point of programming is how to handle errors and close

resources even if errors occur.

This exercise requires you to handle various errors. Because error handling

is rather programming language specific you'll have to refer to the tests

for your track to see what's exactly required.

Note that, when trying to submit an exercise, make sure the solution is in the `exercism/python/<exerciseName>` directory.

For example, if you're submitting `bob.py` for the Bob exercise, the submit command would be something like `exercism submit <path_to_exercism_dir>/python/bob/bob.py`.

For more detailed information about running tests, code style and linting,

please see the [help page](http://exercism.io/languages/python).

Problem 6 at Project Euler [http://projecteuler.net/problem=6](http://projecteuler.net/problem=6)

It's possible to submit an incomplete solution so you can see how others have completed the exercise.