Go over mypy findings

[Almenon]

A lot of findings are nonsense but there might be some valid ones or ones I can set to be ignored:

C:\dev\AREPL-backend>mypy python
python\overloads.py:52: error: Item "None" of "Optional[FrameType]" has no attribute "f_back"
python\overloads.py:53: error: Item "None" of "Union[FrameType, None, Any]" has no attribute "f_globals"
python\overloads.py:62: error: Argument 1 to "next" has incompatible type "Optional[Iterator[Any]]"; expected "Iterator[Any]"
python\overloads.py:79: error: Name 'howdoi' is not defined
python\overloads.py:86: error: Name 'howdoi' is not defined
python\stdlib_list\fetch.py:4: error: Cannot find implementation or library stub for module named 'sphinx.ext.intersphinx'
python\examples.py:71: error: Skipping analyzing 'pandas': found module but no type hints or library stubs
python\examples.py:112: error: Name 'raw_input' is not defined
python\examples.py:160: error: Skipping analyzing 'numpy': found module but no type hints or library stubs
python\examples.py:161: error: Cannot find implementation or library stub for module named 'matplotlib.pyplot'
python\examples.py:161: error: Cannot find implementation or library stub for module named 'matplotlib'
python\examples.py:253: error: Incompatible types in assignment (expression has type "TextIO", variable has type "Callable[[Any], Any]")
python\examples.py:254: error: Argument 1 to "writer" has incompatible type "Callable[[Any], Any]"; expected "_Writer"
python\examples.py:262: error: Incompatible types in assignment (expression has type "TextIO", variable has type "Callable[[Any], Any]")
python\examples.py:263: error: Argument 1 to "reader" has incompatible type "Callable[[Any], Any]"; expected "Iterable[str]"
python\examples.py:314: error: Incompatible types in assignment (expression has type "int", variable has type "str")
python\examples.py:334: error: Incompatible types in assignment (expression has type "str", variable has type "Callable[[Any], Any]")
python\examples.py:335: error: Need type annotation for 'g' (hint: "g: Dict[<type>, <type>] = ...")
python\examples.py:336: error: Need type annotation for 'h' (hint: "h: List[<type>] = ...")
python\examples.py:337: error: Incompatible types in assignment (expression has type "List[List[List[<nothing>]]]", variable has type "int")
python\examples.py:346: error: Incompatible types in assignment (expression has type "TextIO", variable has type "Callable[[Any], Any]")
python\examples.py:366: error: Item "None" of "Optional[Match[str]]" has no attribute "groupdict"
python\examples.py:367: error: Item "None" of "Optional[Match[str]]" has no attribute "span"
python\custom_handlers.py:90: error: Dict entry 0 has incompatible type "str": "Type[date]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:90: error: Dict entry 1 has incompatible type "str": "Type[DatetimeHandler]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:91: error: Dict entry 0 has incompatible type "str": "Type[time]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:91: error: Dict entry 1 has incompatible type "str": "Type[DatetimeHandler]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:92: error: Dict entry 0 has incompatible type "str": "Type[datetime]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:92: error: Dict entry 1 has incompatible type "str": "Type[DatetimeHandler]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:94: error: Dict entry 0 has incompatible type "str": "Type[FrameType]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:94: error: Dict entry 1 has incompatible type "str": "Type[FrameHandler]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:95: error: Dict entry 0 has incompatible type "str": "Type[CodeType]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:95: error: Dict entry 1 has incompatible type "str": "Type[CodeHandler]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:96: error: Dict entry 0 has incompatible type "str": "Type[Decimal]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:96: error: Dict entry 1 has incompatible type "str": "Type[DecimalHandler]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:97: error: Dict entry 0 has incompatible type "str": "Type[GeneratorType]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\custom_handlers.py:97: error: Dict entry 1 has incompatible type "str": "Type[GeneratorHandler]"; expected "str": "Union[Type[RegexMatchHandler], Type[Match[str]], Type[None]]"
python\jsonpickle\ext\numpy.py:8: error: Skipping analyzing 'numpy': found module but no type hints or library stubs
python\jsonpickle\ext\numpy.py:8: note: See https://mypy.readthedocs.io/en/latest/running_mypy.html#missing-imports
python\jsonpickle\ext\pandas.py:3: error: Skipping analyzing 'pandas': found module but no type hints or library stubs
python\pickler.py:56: error: Cannot assign to a type
python\user_error.py:16: error: Incompatible types in assignment (expression has type "Optional[TracebackType]", variable has type "TracebackType")
python\saved.py:46: error: Argument 1 to "UserError" has incompatible type "Optional[BaseException]"; expected "BaseException"
python\saved.py:46: error: Argument 2 to "UserError" has incompatible type "Optional[TracebackType]"; expected "TracebackType"
python\saved.py:90: error: Incompatible types in assignment (expression has type "str", variable has type "List[str]")
python\saved.py:91: error: Incompatible return value type (got "List[str]", expected "str")
python\saved.py:105: error: Argument 1 to "UserError" has incompatible type "Optional[BaseException]"; expected "BaseException"
python\saved.py:105: error: Argument 2 to "UserError" has incompatible type "Optional[TracebackType]"; expected "TracebackType"
python\python_evaluator.py:24: error: Cannot find implementation or library stub for module named 'howdoi'
python\python_evaluator.py:71: error: Argument 2 to "ReturnInfo" has incompatible type "str"; expected "Dict[Any, Any]"
python\python_evaluator.py:71: error: Argument 3 to "ReturnInfo" has incompatible type "None"; expected "float"
python\python_evaluator.py:71: error: Argument 4 to "ReturnInfo" has incompatible type "None"; expected "float"
python\python_evaluator.py:160: error: Argument 1 to "UserError" has incompatible type "Optional[BaseException]"; expected "BaseException"
python\python_evaluator.py:160: error: Argument 2 to "UserError" has incompatible type "Optional[TracebackType]"; expected "TracebackType"
python\python_evaluator.py:162: error: Argument 1 to "UserError" has incompatible type "Optional[BaseException]"; expected "BaseException"
python\python_evaluator.py:162: error: Argument 2 to "UserError" has incompatible type "Optional[TracebackType]"; expected "TracebackType"
python\python_evaluator.py:206: error: Argument 4 to "ReturnInfo" has incompatible type "None"; expected "float"
python\python_evaluator.py:223: error: Argument 2 to "ReturnInfo" has incompatible type "str"; expected "Dict[Any, Any]"
python\python_evaluator.py:223: error: Argument 3 to "ReturnInfo" has incompatible type "None"; expected "float"
python\python_evaluator.py:223: error: Argument 4 to "ReturnInfo" has incompatible type "None"; expected "float"
python\python_evaluator.py:231: error: "ReturnInfo" has no attribute "userErrorMsg"; maybe "userError"?
python\test_python_evaluator.py:5: error: Skipping analyzing 'pytest': found module but no type hints or library stubs
python\arepl_dump.py:9: error: Need type annotation for 'context' (hint: "context: Dict[<type>, <type>] = ...")
python\arepl_dump.py:19: error: Item "None" of "Optional[FrameType]" has no attribute "f_back"
python\arepl_dump.py:21: error: Item "None" of "Union[FrameType, None, Any]" has no attribute "f_code"
python\arepl_dump.py:22: error: Item "None" of "Union[FrameType, None, Any]" has no attribute "f_lineno"
python\arepl_dump.py:23: error: Item "None" of "Union[FrameType, None, Any]" has no attribute "f_code"
python\arepl_dump.py:35: error: Unsupported right operand type for in ("int")
python\arepl_dump.py:37: error: Item "None" of "Union[FrameType, None, Any]" has no attribute "f_locals"
python\arepl_dump.py:45: error: Argument 3 to "ReturnInfo" has incompatible type "None"; expected "float"
python\test_arepl_dump.py:1: error: Skipping analyzing 'pytest': found module but no type hints or library stubs
Found 70 errors in 13 files (checked 31 source files)