This removes the assertions that checked plugin devs didn't do anything
overly bad in favour of using mypy to ensure appropriate type-checking.
It also moves the ProgressCallback typing information to constants in
order to avoid circular imports (since constants doesn't import
anything).
This includes:
* Better ways of checking empty lists
* Not shadowing builtin functions like filter
* Preventing invalid slash warnings by marking strings as regexps
* Removing unnecessary brackets
* Lowercase variable names
* Adding/updating parameters in docstrings
* Removing unused code (lines not chunks)
* Change in not a member tests
* Changing some methods to static
* Shorting range membership checks
* Missing parameters
* Make some exception handlers more specific
* Don't define a lambda to a variable
* A few more instance checks to help type checkers
Relented on the strict import of direct objects/classes for the typing
module only. Typing module components can be directly imported because
it makes the code really painful to read and write otherwise.
This is still in-line with the python style guide adopted from Google at
http://google.github.io/styleguide/pyguide.html section 2.2.
The __getattribute__ method is called for *all* attribute lookups, and
the python implementation is likely slow. The only function the python
implementation provided was to check that properties started with
helper_. Since this only provided a log message, we could add it back
in only if the log level is high enough? Either way, it's not
significant enough to warrant costing extra time in every attribute
lookup on every object.
It now makes use of the original array's symbol table to get the pointer
template, such that the size of the pointer is correct according to the
original table. Resolves "pointer.size" attribute errors (firing inside
a property and thus throwing off unusual exceptions).
Mike Auty