C:\Users\Levitanus>mypy --show-traceback E:\packages\pyksp\pyksp\new_base_types.py
E:\packages\pyksp\pyksp\new_base_types.py:1: error: Invalid type "self"
E:\packages\pyksp\pyksp\new_base_types.py:221: error: Argument 1 of "__eq__" incompatible with supertype "object"
E:\packages\pyksp\pyksp\new_base_types.py:221: error: Return type of "__eq__" incompatible with supertype "object"
E:\packages\pyksp\pyksp\new_base_types.py:222: error: Cannot instantiate abstract class 'AstEq' with abstract attribute 'get_value'
E:\packages\pyksp\pyksp\new_base_types.py:225: error: Argument 1 of "__ne__" incompatible with supertype "object"
E:\packages\pyksp\pyksp\new_base_types.py:225: error: Return type of "__ne__" incompatible with supertype "object"
E:\packages\pyksp\pyksp\new_base_types.py:226: error: Cannot instantiate abstract class 'AstNe' with abstract attribute 'get_value'
E:\packages\pyksp\pyksp\new_base_types.py:230: error: Cannot instantiate abstract class 'AstLt' with abstract attribute 'get_value'
E:\packages\pyksp\pyksp\new_base_types.py:234: error: Cannot instantiate abstract class 'AstGt' with abstract attribute 'get_value'
E:\packages\pyksp\pyksp\new_base_types.py:238: error: Cannot instantiate abstract class 'AstLe' with abstract attribute 'get_value'
E:\packages\pyksp\pyksp\new_base_types.py:242: error: Cannot instantiate abstract class 'AstGe' with abstract attribute 'get_value'
E:\packages\pyksp\pyksp\new_base_types.py:351: error: Name 'AstNot' already defined on line 343
E:\packages\pyksp\pyksp\new_base_types.py:283: error: INTERNAL ERROR -- please report a bug at https://github.com/python/mypy/issues version: 0.620
Traceback (most recent call last):
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\Levitanus\AppData\Local\Programs\Python\Python37-32\Scripts\mypy.exe\__main__.py", line 9, in <module>
    sys.exit(console_entry())
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\__main__.py", line 7, in console_entry
    main(None)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\main.py", line 91, in main
    res = type_check_only(sources, bin_dir, options, flush_errors, fscache)  # noqa
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\main.py", line 148, in type_check_only
    fscache=fscache)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\build.py", line 177, in build
    flush_errors, fscache)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\build.py", line 350, in _build
    graph = dispatch(sources, manager)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\build.py", line 2560, in dispatch
    process_graph(graph, manager)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\build.py", line 2853, in process_graph
    process_stale_scc(graph, scc, manager)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\build.py", line 2976, in process_stale_scc
    graph[id].type_check_first_pass()
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\build.py", line 2151, in type_check_first_pass
    self.type_checker().check_first_pass()
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 253, in check_first_pass
    self.accept(d)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 352, in accept
    stmt.accept(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\nodes.py", line 808, in accept
    return visitor.visit_class_def(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 1368, in visit_class_def
    self.accept(defn.defs)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 352, in accept
    stmt.accept(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\nodes.py", line 873, in accept
    return visitor.visit_block(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 1514, in visit_block
    self.accept(s)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 352, in accept
    stmt.accept(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\nodes.py", line 591, in accept
    return visitor.visit_func_def(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 663, in visit_func_def
    self._visit_func_def(defn)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 667, in _visit_func_def
    self.check_func_item(defn, name=defn.name())
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 729, in check_func_item
    self.check_func_def(defn, typ, name)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 895, in check_func_def
    self.accept(item.body)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 352, in accept
    stmt.accept(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\nodes.py", line 873, in accept
    return visitor.visit_block(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 1514, in visit_block
    self.accept(s)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 352, in accept
    stmt.accept(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\nodes.py", line 921, in accept
    return visitor.visit_assignment_stmt(self)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 1521, in visit_assignment_stmt
    self.check_assignment(s.lvalues[-1], s.rvalue, s.type is None, s.new_syntax)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 1570, in check_assignment
    if self.check_compatibility_all_supers(lvalue, lvalue_type, rvalue):
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 1662, in check_compatibility_all_supers
    base_type, base_node = self.lvalue_type_from_base(lvalue_node, base)
  File "c:\users\levitanus\appdata\local\programs\python\python37-32\lib\site-packages\mypy\checker.py", line 1749, in lvalue_type_from_base
    assert self_type is not None, "Internal error: base lookup outside class"
AssertionError: Internal error: base lookup outside class
E:\packages\pyksp\pyksp\new_base_types.py:283: : note: use --pdb to drop into pdb