drop py37 support, remove dependencies related to typing backward-com…

…patibility

.github/workflows/pythonpackage.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        PYTHON_VERSION: ["3.7", "3.8", "3.9", "3.10"]
+        PYTHON_VERSION: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     steps:
     - uses: actions/checkout@v2
 

fgpyo/fasta/builder.py

@@ -32,6 +32,7 @@
     'AAAAAAAAAANNN'
 
 """
+
 import textwrap
 from pathlib import Path
 from typing import TYPE_CHECKING
@@ -48,7 +49,6 @@ def samtools_dict(*args: Any) -> None:
     def samtools_faidx(*args: Any) -> None:
         pass
 
-
 else:
     from pysam import dict as samtools_dict
     from pysam import faidx as samtools_faidx

fgpyo/fastx/__init__.py

@@ -24,6 +24,7 @@
    seq2: GGGG, seq2: TTTT
 
 """
+
 from contextlib import AbstractContextManager
 from pathlib import Path
 from types import TracebackType

fgpyo/io/__init__.py

@@ -42,6 +42,7 @@
     "10"
 
 """
+
 import gzip
 import io
 import os

fgpyo/read_structure.py

@@ -61,6 +61,7 @@
       correspond to the given read segment
 
 """
+
 import enum
 from typing import Iterable
 from typing import Iterator

fgpyo/sam/builder.py

@@ -10,6 +10,7 @@
     - :class:`~fgpyo.sam.builder.SamBuilder` -- A builder class that allows the accumulation
         of alignment records and access as a list and writing to file.
 """
+
 from array import array
 from pathlib import Path
 from random import Random

fgpyo/util/inspect.py

@@ -1,28 +1,25 @@
+import functools
 import sys
+import typing
+from enum import Enum
+from functools import partial
+from pathlib import PurePath
 from typing import Any
+from typing import Callable
 from typing import Dict
 from typing import Iterable
 from typing import List
+from typing import Literal
+from typing import Optional
 from typing import Tuple
 from typing import Type
 from typing import Union
 
-if sys.version_info >= (3, 8):
-    from typing import Literal
-else:
-    from typing_extensions import Literal
 if sys.version_info >= (3, 12):
     from typing import TypeAlias
 else:
     from typing_extensions import TypeAlias
 
-import functools
-from enum import Enum
-from functools import partial
-from pathlib import PurePath
-from typing import Callable
-from typing import Optional
-
 import attr
 
 import fgpyo.util.types as types
@@ -60,18 +57,24 @@ def split_at_given_level(
             decrease_in_depth += high_level_split.count(char)
         outer_depth_of_split += increase_in_depth - decrease_in_depth
 
-        assert outer_depth_of_split >= 0, "Unpaired depth character! Likely incorrect output"
+        assert (
+            outer_depth_of_split >= 0
+        ), "Unpaired depth character! Likely incorrect output"
 
         current_outer_splits.append(high_level_split)
         if outer_depth_of_split == 0:
             out_vals.append(split_delim.join(current_outer_splits))
             current_outer_splits = []
-    assert outer_depth_of_split == 0, "Unpaired depth character! Likely incorrect output!"
+    assert (
+        outer_depth_of_split == 0
+    ), "Unpaired depth character! Likely incorrect output!"
     return out_vals
 
 
 def _get_parser(
-    cls: Type, type_: TypeAlias, parsers: Optional[Dict[type, Callable[[str], Any]]] = None
+    cls: Type,
+    type_: TypeAlias,
+    parsers: Optional[Dict[type, Callable[[str], Any]]] = None,
 ) -> partial:
     """Attempts to find a parser for a provided type.
 
@@ -109,8 +112,8 @@ def get_parser() -> partial:
                 raise ValueError("Unable to parse set (try typing.Set[type])")
             elif type_ == dict:
                 raise ValueError("Unable to parse dict (try typing.Mapping[type])")
-            elif types.get_origin_type(type_) == list:
-                subtypes = types.get_arg_types(type_)
+            elif typing.get_origin(type_) == list:
+                subtypes = typing.get_args(type_)
 
                 assert (
                     len(subtypes) == 1
@@ -130,8 +133,8 @@ def get_parser() -> partial:
                         ]
                     )
                 )
-            elif types.get_origin_type(type_) == set:
-                subtypes = types.get_arg_types(type_)
+            elif typing.get_origin(type_) == set:
+                subtypes = typing.get_args(type_)
                 assert (
                     len(subtypes) == 1
                 ), "Sets are allowed only one subtype per PEP specification!"
@@ -146,18 +149,20 @@ def get_parser() -> partial:
                         if s == "{}"
                         else [
                             subtype_parser(item)
-                            for item in set(split_at_given_level(s[1:-1], split_delim=","))
+                            for item in set(
+                                split_at_given_level(s[1:-1], split_delim=",")
+                            )
                         ]
                     )
                 )
-            elif types.get_origin_type(type_) == tuple:
+            elif typing.get_origin(type_) == tuple:
                 subtype_parsers = [
                     _get_parser(
                         cls,
                         subtype,
                         parsers,
                     )
-                    for subtype in types.get_arg_types(type_)
+                    for subtype in typing.get_args(type_)
                 ]
 
                 def tuple_parse(tuple_string: str) -> Tuple[Any, ...]:
@@ -172,16 +177,18 @@ def tuple_parse(tuple_string: str) -> Tuple[Any, ...]:
                     if len(tuple_string) == 0:
                         return ()
                     else:
-                        val_strings = split_at_given_level(tuple_string, split_delim=",")
+                        val_strings = split_at_given_level(
+                            tuple_string, split_delim=","
+                        )
                         return tuple(
                             parser(val_str)
                             for parser, val_str in zip(subtype_parsers, val_strings)
                         )
 
                 return functools.partial(tuple_parse)
 
-            elif types.get_origin_type(type_) == dict:
-                subtypes = types.get_arg_types(type_)
+            elif typing.get_origin(type_) == dict:
+                subtypes = typing.get_args(type_)
                 assert (
                     len(subtypes) == 2
                 ), "Dict object must have exactly 2 subtypes per PEP specification!"
@@ -208,10 +215,14 @@ def dict_parse(dict_string: str) -> Dict[Any, Any]:
                     if len(dict_string) == 0:
                         return {}
                     else:
-                        outer_splits = split_at_given_level(dict_string, split_delim=",")
+                        outer_splits = split_at_given_level(
+                            dict_string, split_delim=","
+                        )
                         out_dict = {}
                         for outer_split in outer_splits:
-                            inner_splits = split_at_given_level(outer_split, split_delim=";")
+                            inner_splits = split_at_given_level(
+                                outer_split, split_delim=";"
+                            )
                             assert (
                                 len(inner_splits) % 2 == 0
                             ), "Inner splits of dict didn't have matched key val pairs"
@@ -228,15 +239,21 @@ def dict_parse(dict_string: str) -> Dict[Any, Any]:
                 return functools.partial(type_)
             elif isinstance(type_, type(type(None))):
                 return functools.partial(types.none_parser)
-            elif types.get_origin_type(type_) is Union:
+            elif typing.get_origin(type_) is Union:
                 return types.make_union_parser(
                     union=type_,
-                    parsers=[_get_parser(cls, arg, parsers) for arg in types.get_arg_types(type_)],
+                    parsers=[
+                        _get_parser(cls, arg, parsers)
+                        for arg in typing.get_args(type_)
+                    ],
                 )
-            elif types.get_origin_type(type_) is Literal:  # Py>=3.7.
+            elif typing.get_origin(type_) is Literal:  # Py>=3.7.
                 return types.make_literal_parser(
                     type_,
-                    [_get_parser(cls, type(arg), parsers) for arg in types.get_arg_types(type_)],
+                    [
+                        _get_parser(cls, type(arg), parsers)
+                        for arg in typing.get_args(type_)
+                    ],
                 )
             else:
                 raise ParserNotFoundException(
@@ -255,7 +272,9 @@ def dict_parse(dict_string: str) -> Dict[Any, Any]:
 
 
 def attr_from(
-    cls: Type, kwargs: Dict[str, str], parsers: Optional[Dict[type, Callable[[str], Any]]] = None
+    cls: Type,
+    kwargs: Dict[str, str],
+    parsers: Optional[Dict[type, Callable[[str], Any]]] = None,
 ) -> Any:
     """Builds an attr class from key-word arguments
 
@@ -289,7 +308,11 @@ def attr_from(
             # try setting by casting
             # Note that while bools *can* be cast from string, all non-empty strings evaluate to
             # True, because python, so we need to check for that explicitly
-            if not set_value and attribute.type is not None and not attribute.type == bool:
+            if (
+                not set_value
+                and attribute.type is not None
+                and not attribute.type == bool
+            ):
                 try:
                     return_value = attribute.type(str_value)
                     set_value = True
@@ -316,8 +339,8 @@ def attr_from(
 
 def attribute_is_optional(attribute: attr.Attribute) -> bool:
     """Returns True if the attribute is optional, False otherwise"""
-    return types.get_origin_type(attribute.type) is Union and isinstance(
-        None, types.get_arg_types(attribute.type)
+    return typing.get_origin(attribute.type) is Union and isinstance(
+        None, typing.get_args(attribute.type)
     )
 
 

fgpyo/util/logging.py

@@ -34,19 +34,13 @@
 """
 
 import logging
-import sys
-
-if sys.version_info >= (3, 8):
-    from typing import Literal
-else:
-    from typing_extensions import Literal
-
 import socket
 from contextlib import AbstractContextManager
 from logging import Logger
 from threading import RLock
 from typing import Any
 from typing import Callable
+from typing import Literal
 from typing import Optional
 from typing import Union
 

fgpyo/util/types.py

@@ -1,49 +1,15 @@
 import collections
 import inspect
-import sys
 import typing
 from enum import Enum
 from functools import partial
 from typing import Callable
 from typing import Iterable
+from typing import Literal
 from typing import Type
 from typing import TypeVar
 from typing import Union
 
-# `get_origin_type` is a method that gets the outer type (ex list in a List[str])
-# `get_arg_types` is a method that gets the inner type (ex str in a List[str])
-if sys.version_info >= (3, 8):
-    from typing import Literal
-
-    get_origin_type = typing.get_origin
-    get_arg_types = typing.get_args
-else:
-    import typing_inspect
-    from typing_extensions import Literal
-
-    def get_origin_type(tp: Type) -> Type:
-        """Returns the outer type of a Typing object (ex list in a List[T])"""
-
-        if type(tp) is type(Literal):  # Py<=3.6.
-            return Literal
-        origin = typing_inspect.get_origin(tp)
-        return {
-            typing.List: list,
-            typing.Iterable: collections.abc.Iterable,
-            typing.Sequence: collections.abc.Sequence,
-            typing.Tuple: tuple,
-            typing.Set: set,
-            typing.Mapping: dict,
-            typing.Dict: dict,
-        }.get(origin, origin)
-
-    def get_arg_types(tp: Type) -> Type:
-        """Gets the inner types of a Typing object (ex T in a List[T])"""
-
-        if type(tp) is type(Literal):  # Py<=3.6.
-            return tp.__values__
-        return typing_inspect.get_args(tp, evaluate=True)  # evaluate=True default on Py>=3.7.
-
 
 UnionType = TypeVar("UnionType", bound="Union")
 EnumType = TypeVar("EnumType", bound="Enum")
@@ -109,7 +75,7 @@ def is_constructible_from_str(type_: type) -> bool:
 
 def _is_optional(type_: type) -> bool:
     """Returns true if type_ is optional"""
-    return get_origin_type(type_) is Union and type(None) in get_arg_types(type_)
+    return typing.get_origin(type_) is Union and type(None) in typing.get_args(type_)
 
 
 def _make_union_parser_worker(
@@ -137,28 +103,32 @@ def _make_union_parser_worker(
     raise ValueError(f"{value} could not be parsed as any of {union}")
 
 
-def make_union_parser(union: Type[UnionType], parsers: Iterable[Callable[[str], type]]) -> partial:
+def make_union_parser(
+    union: Type[UnionType], parsers: Iterable[Callable[[str], type]]
+) -> partial:
     """Generates a parser function for a union type object and set of parsers for the possible
     parsers to that union type object
     """
     return partial(_make_union_parser_worker, union, parsers)
 
 
 def _make_literal_parser_worker(
-    literal: Type[LiteralType], parsers: Iterable[Callable[[str], LiteralType]], value: str
+    literal: Type[LiteralType],
+    parsers: Iterable[Callable[[str], LiteralType]],
+    value: str,
 ) -> LiteralType:
     """Worker function behind literal parsing. Iterates through possible literals and
     returns the value produced by the first literal that matches expectation.
     Otherwise raises an error if none work"""
-    for arg, p in zip(get_arg_types(literal), parsers):
+    for arg, p in zip(typing.get_args(literal), parsers):
         try:
             if p(value) == arg:
                 return arg
         except ValueError:
             pass
     raise InspectException(
         "invalid choice: {!r} (choose from {})".format(
-            value, ", ".join(map(repr, map(str, get_arg_types(literal))))
+            value, ", ".join(map(repr, map(str, typing.get_args(literal))))
         )
     )
 
@@ -174,7 +144,11 @@ def make_literal_parser(
 
 def is_list_like(type_: type) -> bool:
     """Returns true if the value is a list or list like object"""
-    return get_origin_type(type_) in [list, collections.abc.Iterable, collections.abc.Sequence]
+    return typing.get_origin(type_) in [
+        list,
+        collections.abc.Iterable,
+        collections.abc.Sequence,
+    ]
 
 
 def none_parser(value: str) -> Literal[None]: