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Comment by kumarvvr | Hacker News Reader

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kumarvvr

I am delighted every time the Python Standard Library is mentioned. Always has a nice surprise.

The last time I was surprised was the itertools library.

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I feel the same way. Last week, I was surprised that `pow` in Python is actually a modpow: `pow(base, exp[, mod])`.

Also check https://pymotw.com/3/. It's a great tour of the Python standard library

And since 3.8 the exponent can be negative, which lets you compute modular inverses without having to reimplement the extended Euclidean algorithm.

    >>> pow(5, -1, 13)
    8
    >>> 5 * 8 % 13
    1

Huh, it's the little things that are the neatest surpises. Having to write the EEA multiple times during my crypto class to do the homework was a real pain in the ass.

In case you haven't known this, check out data classes. It is so obvious yet so useful that I don't want to write Python lower than 3.7 anymore.

Worthy of note: https://attrs.org, which inspired dataclasses and has more features.

I’ll also plug one of my favourite python libraries: https://pydantic-docs.helpmanual.io/

Yes I agree, I also use typing.NamedTuple a lot

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