Make fields accessible by __getitem__

[Allan-S-Menefee]

I'm working with pyais and I'm finding the syntax NMEAMessage(blah).asdict()['mmsi']) clumsy. It should be possible to subscript these fields if NMEAMessage defined a getitem.

I will try to enter a pull request at some point, if I'm able to make time.

[M0r13n]

Hey,

jep, you are definitely right. I believe that I tried it during the early days of Pyais. Back then I came across some kind of issue/error and stopped working on it. Anyway I would love to see a PR from you. Otherwise I will try to implement it, as soon as time allows!

Kind regards,
Leon

[M0r13n]

Hey,

I made the NMEAMessage class subscriptable. You can now access it's fields via []. See: https://pyais.readthedocs.io/en/latest/messages.html

Please note, that you provided NMEAMessage(blah).asdict()['mmsi']) as an example. This still won't work, because the NMEAMessage just capsules the NMEA message. It does not know or care about the actual payload. In order to access the mmsi, you first have to call NMEAMessage.decode().