-# A note on testing
-
-Testing's easier if everything returns a meaningful value
-
-Saves having to look up different values after performing each operation
-
-`__init__` can't return a value (restriction of Python)
-
-```python
-if __name__ == "__main__":
- import doctest
- doctest.testmod(extraglobs={'pe': PocketEnigma(1, 'a')})
-```
-
-`pe` is now available in all tests.
-
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