Get flake8 to check for unused imports.

requirements.txt

@@ -1,10 +1,11 @@
-pycodestyle==2.10.0
-pyfakefs==5.4.1
-pytest==7.4.4
-pytest-mypy==0.10.3
-termcolor==1.1.0
-types-termcolor==1.1.0
+pycodestyle>=2.0
+pyfakefs>=5.0
+pytest>=6.0
+pytest-mypy>=0.10
+termcolor>=1.0
+types-termcolor>=1.0
 numpy==1.21.6
-mypy==1.4.1
-pytest-watch==4.2.0
-tox==4.8.0
+mypy>=1.3
+pytest-watch>=4.0
+tox>=3.0
+flake8>=4.0

src/echo/arg_resolver.py

@@ -2,16 +2,12 @@
 
 from typing import Dict, Optional, Tuple, Any, List, Sequence
 
-import pprint
 import sys
-import types
 
 from echo.interp_result import Result, ExceptionData, check_result
 from echo import code_attributes
 from echo.elog import log
 
-from termcolor import cprint
-
 
 def _arg_join(arg_names: Sequence[str]) -> str:
     if len(arg_names) == 1:

src/echo/bc_helpers.py

@@ -1,7 +1,6 @@
 import dataclasses
-import types
 from typing import (
-    Callable, Tuple, Text, Optional, Any, Dict, List, TypeVar, Generic
+    Callable, Tuple, Text, Optional, Any, List,
 )
 
 VersionInfo = Tuple[int, int, int, str, int]

src/echo/builtin_build_class.py

@@ -1,10 +1,10 @@
-from typing import Text, Tuple, Any, Dict, Optional, Union, Type
+from typing import Text, Tuple, Any, Dict, Union, Type
 
-from echo.epy_object import EPyObject, EPyType
+from echo.epy_object import EPyType
 from echo.interp_result import Result, ExceptionData, check_result
 from echo.eobjects import (
-    EFunction, EClass, EMethod, EBuiltin,
-    do_setitem, get_guest_builtin,
+    EClass, EBuiltin,
+    get_guest_builtin,
 )
 from echo.interp_context import ICtx
 from echo.elog import log

src/echo/builtin_bytearray.py

@@ -1,15 +1,8 @@
-from typing import Text, Tuple, Any, Dict, Optional
+from typing import Text, Tuple, Any, Dict
 
-from echo.elog import log
-from echo.epy_object import EPyObject
 from echo.interp_result import Result, ExceptionData, check_result
-from echo import interp_routines
-from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
-)
+from echo.eobjects import register_builtin
 from echo.interp_context import ICtx
-from echo import iteration_helpers
 
 
 @register_builtin('bytearray')

src/echo/builtin_dict.py

@@ -1,11 +1,10 @@
-from typing import Text, Tuple, Any, Dict, Optional
+from typing import Text, Tuple, Any, Dict
 
 from echo.elog import log
-from echo.epy_object import EPyObject
 from echo.interp_result import Result, check_result
 from echo import interp_routines
 from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
+    EClass, EInstance,
     register_builtin, _is_dict_builtin, get_guest_builtin,
 )
 from echo.interp_context import ICtx

src/echo/builtin_enumerate.py

@@ -1,14 +1,9 @@
 import itertools
 from typing import Text, Tuple, Any, Dict, Optional
 
-from echo.elog import log
 from echo.epy_object import EPyObject, EPyType, AttrWhere
 from echo.interp_result import Result, check_result
-from echo import interp_routines
-from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
-)
+from echo.eobjects import register_builtin, get_guest_builtin
 from echo.interp_context import ICtx
 
 

src/echo/builtin_exception.py

@@ -1,12 +1,9 @@
 from typing import Tuple, Any, Dict, Optional
 
 from echo.epy_object import EPyObject, AttrWhere
-from echo.elog import log
-from echo.epy_object import EPyObject
 from echo.interp_result import Result, ExceptionData, check_result
-from echo import interp_routines
 from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
+    EClass, EInstance,
     register_builtin, _is_exception_builtin, get_guest_builtin,
 )
 from echo.interp_context import ICtx
@@ -42,7 +39,7 @@ def _do_exception_new(
         kwargs: Dict[str, Any],
         ictx: ICtx) -> Result[Any]:
     assert 1 <= len(args) and not kwargs, (args, kwargs)
-    msg = args[1] if len(args) == 2 else None
+    # msg = args[1] if len(args) == 2 else None
     if isinstance(args[0], EClass):
         inst = EInstance(args[0])
         return Result(inst)

src/echo/builtin_genericalias.py

@@ -4,16 +4,10 @@
 from typing import Text, Tuple, Any, Dict, Optional
 
 from echo.enative_fn import ENativeFn
-from echo.elog import log
 from echo.epy_object import EPyObject, EPyType, AttrWhere
-from echo.interp_result import Result, ExceptionData, check_result
-from echo import interp_routines
-from echo.eobjects import (
-    EFunction, EMethod, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin, E_PREFIX
-)
+from echo.interp_result import Result, check_result
+from echo.eobjects import EMethod, get_guest_builtin, E_PREFIX
 from echo.interp_context import ICtx
-from echo import iteration_helpers
 
 
 class EGenericAliasType(EPyType):

src/echo/builtin_int.py

@@ -1,13 +1,11 @@
-from typing import Text, Tuple, Any, Dict, Optional
+from typing import Text, Tuple, Any, Dict
 import operator
 
-from echo.elog import log
 from echo.epy_object import EPyObject
 from echo.interp_result import Result, check_result, ExceptionData
-from echo import interp_routines
 from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
+    EClass, EInstance,
+    register_builtin, get_guest_builtin,
 )
 from echo.interp_context import ICtx
 
@@ -52,7 +50,6 @@ def _do_int_new(
     value = args[1] if len(args) > 1 else 0
     if isinstance(cls, EClass):
         assert get_guest_builtin('int') in cls.get_mro()
-        globals_: Dict[str, Any] = {}
         o = EInstance(cls)
         o.builtin_storage[int] = value
         return Result(o)

src/echo/builtin_iter.py

@@ -4,14 +4,11 @@
 from typing import Text, Tuple, Any, Dict, Optional, Type
 from collections import OrderedDict as odict
 
-from echo.elog import log
 from echo.epy_object import EPyObject, AttrWhere, EPyType, try_invoke
 from echo.enative_fn import ENativeFn
 from echo.interp_result import Result, ExceptionData, check_result
-from echo import interp_routines
 from echo.eobjects import (
-    EFunction, EMethod, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
+    EMethod, register_builtin, get_guest_builtin,
 )
 from echo.interp_context import ICtx
 

src/echo/builtin_list.py

@@ -1,13 +1,12 @@
-from typing import Tuple, Any, Dict, Optional, List
+from typing import Tuple, Any, Dict, List
 
 from echo.elog import log
 from echo.epy_object import EPyObject
 from echo.interp_result import Result, check_result, ExceptionData
 from echo import interp_routines
 from echo import iteration_helpers
 from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
-    register_builtin, get_guest_builtin, is_list_builtin,
+    EClass, EInstance, register_builtin, get_guest_builtin, is_list_builtin,
 )
 from echo.builtin_genericalias import EGenericAlias
 from echo.interp_context import ICtx

src/echo/builtin_object.py

@@ -1,12 +1,9 @@
-from typing import Text, Tuple, Any, Dict, Optional
+from typing import Text, Tuple, Any, Dict
 
 from echo.elog import log
-from echo.epy_object import EPyObject
-from echo.interp_result import Result, ExceptionData, check_result
-from echo import interp_routines
+from echo.interp_result import Result, check_result
 from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
+    EBuiltin, EClass, EInstance, register_builtin, get_guest_builtin,
 )
 from echo.interp_context import ICtx
 

src/echo/builtin_predicates.py

@@ -1,19 +1,16 @@
+from typing import Text, Tuple, Any, Dict
+
 import collections
 import re
 import types
-from typing import Text, Tuple, Any, Dict, Optional
 
 import io
 import _thread
 
 from echo.elog import log
-from echo.epy_object import EPyObject, AttrWhere, try_invoke
+from echo.epy_object import EPyObject, try_invoke
 from echo.interp_result import Result, check_result, ExceptionData
-from echo import interp_routines
-from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
-)
+from echo.eobjects import EBuiltin, register_builtin, get_guest_builtin
 from echo.interp_context import ICtx
 from echo import iteration_helpers
 

src/echo/builtin_str.py

@@ -1,16 +1,10 @@
-from typing import Text, Tuple, Any, Dict, Optional, List
+from typing import Text, Tuple, Any, Dict, List
 
-from echo.elog import log
 from echo.epy_object import EPyObject
-from echo.interp_result import Result, ExceptionData, check_result
-from echo import interp_routines
-from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
-)
+from echo.interp_result import Result, check_result
+from echo.eobjects import register_builtin, get_guest_builtin
 from echo.interp_context import ICtx
 from echo import iteration_helpers
-from echo.value import Value
 
 
 @register_builtin('str')

src/echo/builtin_super.py

@@ -3,12 +3,8 @@
 from echo.elog import log
 from echo.epy_object import EPyObject, AttrWhere
 from echo.interp_result import Result, check_result, ExceptionData
-from echo import interp_routines
 from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance, EPyType,
-    register_builtin, get_guest_builtin, invoke_desc,
-    _is_type_builtin, _is_dict_builtin, _is_object_builtin,
-    _is_int_builtin,
+    EBuiltin, EClass, EPyType, register_builtin, get_guest_builtin,
 )
 from echo.interp_context import ICtx
 

src/echo/builtin_sys_module.py

@@ -4,7 +4,7 @@
 from echo.enative_fn import ENativeFn
 from echo.eobjects import get_guest_builtin
 from echo.emodule import EModule
-from echo.interp_result import Result, ExceptionData
+from echo.interp_result import Result
 from echo.interp_context import ICtx
 
 

src/echo/builtin_tuple.py

@@ -1,11 +1,9 @@
-from typing import Text, Tuple, Any, Dict, Optional
+from typing import Text, Tuple, Any, Dict
 
-from echo.elog import log
 from echo.epy_object import EPyObject
 from echo.interp_result import Result, check_result
-from echo import interp_routines
 from echo.eobjects import (
-    EFunction, EBuiltin, EClass, EInstance,
+    EClass, EInstance,
     register_builtin, is_tuple_builtin, get_guest_builtin,
 )
 from echo.interp_context import ICtx

src/echo/builtin_type.py

@@ -1,13 +1,9 @@
-from typing import Text, Tuple, Any, Dict, Optional
+from typing import Text, Tuple, Any, Dict
 
 from echo.elog import log
 from echo.epy_object import EPyObject
 from echo.interp_result import Result, ExceptionData, check_result
-from echo import interp_routines
-from echo.eobjects import (
-    EFunction, EClass, EInstance,
-    register_builtin, _is_dict_builtin, get_guest_builtin,
-)
+from echo.eobjects import EClass, register_builtin, get_guest_builtin
 from echo.interp_context import ICtx
 from echo.ebuiltins import TYPE_TO_EBUILTIN
 

src/echo/call_profiler.py

@@ -1,9 +1,7 @@
 from typing import List, Union
 
-import atexit
 import collections
 from operator import itemgetter
-import pprint
 from typing import Tuple, Any, Dict
 from echo.eobjects import EFunction, EPyObject, EPyType
 

src/echo/common.py

@@ -1,11 +1,10 @@
 """Commonly used utility functions."""
 
 import dis
-import itertools
 import functools
 import types
 from typing import (
-    Any, Text, Iterable, Sequence, Tuple, List, TypeVar, Callable, Dict
+    Any, Text, Sequence, Tuple, List, TypeVar, Callable, Dict
 )
 from io import StringIO
 

src/echo/ecell.py

@@ -1,4 +1,4 @@
-from typing import Any, Tuple, Optional
+from typing import Any, Optional
 
 from echo.interp_context import ICtx
 from echo.interp_result import Result

src/echo/eclassmethod.py

@@ -3,7 +3,7 @@
 from echo.epy_object import EPyObject, AttrWhere, EPyType
 from echo.interp_result import Result, ExceptionData, check_result
 from echo.eobjects import (
-    EFunction, EMethod, EBuiltin,
+    EMethod, EBuiltin,
     get_guest_builtin, E_PREFIX,
 )
 from echo.enative_fn import ENativeFn

src/echo/efunction_type.py

@@ -1,6 +1,6 @@
 from typing import Tuple, Optional, Dict, Any
 
-from echo.epy_object import EPyObject, EPyType, AttrWhere
+from echo.epy_object import EPyType, AttrWhere
 from echo.interp_context import ICtx
 from echo.interp_result import Result
 from echo.eobjects import E_PREFIX, get_guest_builtin, EMethod

src/echo/egenerator.py

@@ -1,11 +1,8 @@
-from typing import Tuple, Any, Dict, Optional, Union
+from typing import Tuple, Any, Optional, Union
 
 from echo.epy_object import EPyObject, AttrWhere, EPyType
-from echo.interp_result import Result, ExceptionData, check_result
-from echo.eobjects import (
-    EFunction, EMethod, EBuiltin,
-    get_guest_builtin,
-)
+from echo.interp_result import Result, ExceptionData
+from echo.eobjects import EMethod, get_guest_builtin
 from echo.return_kind import ReturnKind
 from echo.interp_context import ICtx
 from echo.value import Value

src/echo/emap.py

@@ -3,8 +3,7 @@
 from echo.epy_object import EPyObject, AttrWhere, EPyType
 from echo.interp_result import Result, ExceptionData, check_result
 from echo.eobjects import (
-    EFunction, EMethod, EBuiltin,
-    get_guest_builtin, E_PREFIX
+    EFunction, EBuiltin, get_guest_builtin, E_PREFIX
 )
 from echo.interp_context import ICtx
 from echo.elog import log