Implement InputSource and OutputSource equality and hash methods

Here we are after moulte types errors!!

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Implementation

In Silkaj, I need to check the equality of InputSource:

• __eq__() implementation, to allow: inputsource1 == inputsource2

• __hash__() methods should also be implemented. As I understood, it allows those classes stored into dict() and set() to continue working properly.

• I also did it for OutputSource, as it’s pretty similar.

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Readings

• https://hynek.me/articles/hashes-and-equality/
• https://stackoverflow.com/questions/390250/elegant-ways-to-support-equivalence-equality-in-python-classes
• https://medium.com/@s16h/pythons-notimplemented-type-2d720137bf41

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Types

I don’t if we can handle the type of the other argument. I tried, but I think it’s already checked with following block:

        if not isinstance(other, InputSource):
            return NotImplemented

In current code I found Any, and object.

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One commit to change the return value within the equality method when it is not implemented between two different classes from False to NotImplemented.

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Release

We can either wait for 0.54, or I can take care to release a 0.53.1.