Make embedded statuses directly accessible attributes

[starkillerOG]

Consider this test script with a Roborock vacuum:

from miio import RoborockVacuum
r = RoborockVacuum(ip = "192.168.1.IP", token = "TokenTokenToken")
status = r.status()

print(status["CleaningSummary:count"])
Will give
TypeError: 'VacuumStatus' object is not subscriptable

print(status.CleaningSummary:count)
will give
SyntaxError: invalid syntax
This is a invalid syntax since variable names can only contain (A-Z, a-z), (0-9), and (_), see https://realpython.com/python-variables/#variable-names

Therefore overwriding getattribute will not work as intended.
Alright so it does work when using getattr(status, "CleaningSummary:count") which is used inside HomeAssistant for conveniance. So lets keep it.

This PR will make the embeded classes a attribute of the main class, so you can acess the embedded classes using:

print(status.CleaningSummary.count)
Which will work

(This is still needed since using normal python scripts there needs to be an easy way to acces the embeded containers)

[starkillerOG]

@rytilahti I don't know why mypy is complaining about the ._sensors etc.
But in any case that is unrelated to this PR.

[starkillerOG]

@rytilahti could you have a look at this PR, it is very small and simple.

[rytilahti]

Yeah, I was thinking about the naming and I knew it would not be a valid identifier for direct accesses. So, I'm wondering if we should just use double-underscore instead of : as a separator, this would also allow accesses without going through the subcontainer name.

[rytilahti]

We can add this (and update the docstring to inform anyone reading the docs about the fact), and also change the separator to __ instead of :, in this PR?

[starkillerOG]

No __ can not be used as seperator, I tried it but very bad things start happening.
Python uses __ for python variables like __main__, __name__ and even worse __getattribute__ itself is also an attribute to the class, so you get into an infinite loop of __getattribute__ getting itself using another __getattribute__ and you crash the program.

[rytilahti]

I don't think having a double undescore should be a problem as a separator in the middle of the name, as far as I know the dunder methods need to both start and end with __.

What sort of bad things were you experiencing?

[codecov-commenter]

Codecov Report

Merging #1542 (a9ea661) into master (f4abd59) will increase coverage by 0.25%.
The diff coverage is 100.00%.

❗ Current head a9ea661 differs from pull request most recent head 49ef800. Consider uploading reports for the commit 49ef800 to get more accurate results

@@            Coverage Diff             @@
##           master    #1542      +/-   ##
==========================================
+ Coverage   80.82%   81.08%   +0.25%     
==========================================
  Files         151      153       +2     
  Lines       14798    15017     +219     
  Branches     1696     1713      +17     
==========================================
+ Hits        11960    12176     +216     
- Misses       2591     2594       +3     
  Partials      247      247              

Impacted Files	Coverage Δ
miio/devicestatus.py	88.37% <100.00%> (+0.13%)	⬆️
miio/integrations/vacuum/mijia/__init__.py	100.00% <0.00%> (ø)
miio/integrations/vacuum/mijia/pro2vacuum.py	98.14% <0.00%> (ø)
...integrations/vacuum/mijia/tests/test_pro2vacuum.py	100.00% <0.00%> (ø)

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[starkillerOG]

@rytilahti ready for another review/merge

[starkillerOG]

Closing this as it has been resolved by #1573