Investigate if there is anything to learn from pytype

[PCManticore]

https://github.com/google/pytype/blob/master/docs/errors.md Seems to have a bunch of errors similar to those from pylint. Let's see if we can learn anything from this tool (architectural decisions, new checks, etc.)

[sushobhit27]

Here some checks/use cases in pytype which can be included in pylint:

1. invalid-namedtuple-arg $ cat sample.py

   from collections import namedtuple
   my_named_tuple = namedtuple('my_named_tuple', ['_abc'])

   $ pytype sample.py Analyzing 1 sources with 0 dependencies File "sample.py", line 3, in : collections.namedtuple argument '_abc' is not a valid typename or field name. [invalid-namedtuple-arg]

For more details, see https://github.com/google/pytype/blob/master/docs/errors.md#invalid-namedtuple-arg.

$ pylint sample.py

---

Your code has been rated at 10.00/10

2. unsupported-operands $ cat sample.py

   x = "hello" ^ "world"

   $ pytype sample.py Analyzing 1 sources with 0 dependencies File "sample.py", line 1, in : unsupported operand type(s) for xor: 'str' and 'str' [unsupported-operands]

For more details, see https://github.com/google/pytype/blob/master/docs/errors.md#unsupported-operands.

$ pylint sample.py

---

Your code has been rated at 10.00/10 (previous run: 10.00/10, +0.00)