Require Python 3.7.2 (#1542)

Author: jacobtylerwalls

.github/workflows/ci.yaml

@@ -81,7 +81,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
     outputs:
       python-key: ${{ steps.generate-python-key.outputs.key }}
     steps:
@@ -233,7 +233,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
     steps:
       - name: Set temp directory
         run: echo "TEMP=$env:USERPROFILE\AppData\Local\Temp" >> $env:GITHUB_ENV
@@ -282,7 +282,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["pypy-3.6", "pypy-3.7", "pypy-3.8"]
+        python-version: ["pypy-3.7", "pypy-3.8"]
     steps:
       - name: Check out code from GitHub
         uses: actions/checkout@v3.0.2

.pre-commit-config.yaml

@@ -32,7 +32,7 @@ repos:
     hooks:
       - id: pyupgrade
         exclude: tests/testdata
-        args: [--py36-plus]
+        args: [--py37-plus]
   - repo: https://github.com/PyCQA/isort
     rev: 5.10.1
     hooks:

ChangeLog

@@ -6,6 +6,8 @@ What's New in astroid 2.12.0?
 =============================
 Release date: TBA
 
+* ``astroid`` now requires Python 3.7.2 to run.
+
 * Fix ``re`` brain on Python ``3.11``. The flags now come from ``re._compile``.
 
 * Build ``nodes.Module`` for frozen modules which have location information in their

astroid/brain/brain_crypt.py

@@ -4,25 +4,22 @@
 
 from astroid.brain.helpers import register_module_extender
 from astroid.builder import parse
-from astroid.const import PY37_PLUS
 from astroid.manager import AstroidManager
 
-if PY37_PLUS:
-    # Since Python 3.7 Hashing Methods are added
-    # dynamically to globals()
 
-    def _re_transform():
-        return parse(
-            """
-        from collections import namedtuple
-        _Method = namedtuple('_Method', 'name ident salt_chars total_size')
-
-        METHOD_SHA512 = _Method('SHA512', '6', 16, 106)
-        METHOD_SHA256 = _Method('SHA256', '5', 16, 63)
-        METHOD_BLOWFISH = _Method('BLOWFISH', 2, 'b', 22)
-        METHOD_MD5 = _Method('MD5', '1', 8, 34)
-        METHOD_CRYPT = _Method('CRYPT', None, 2, 13)
+def _re_transform():
+    return parse(
         """
-        )
+    from collections import namedtuple
+    _Method = namedtuple('_Method', 'name ident salt_chars total_size')
+
+    METHOD_SHA512 = _Method('SHA512', '6', 16, 106)
+    METHOD_SHA256 = _Method('SHA256', '5', 16, 63)
+    METHOD_BLOWFISH = _Method('BLOWFISH', 2, 'b', 22)
+    METHOD_MD5 = _Method('MD5', '1', 8, 34)
+    METHOD_CRYPT = _Method('CRYPT', None, 2, 13)
+    """
+    )
+
 
-    register_module_extender(AstroidManager(), "crypt", _re_transform)
+register_module_extender(AstroidManager(), "crypt", _re_transform)

astroid/brain/brain_dataclasses.py

@@ -17,7 +17,7 @@
 
 from astroid import context, inference_tip
 from astroid.builder import parse
-from astroid.const import PY37_PLUS, PY39_PLUS
+from astroid.const import PY39_PLUS
 from astroid.exceptions import (
     AstroidSyntaxError,
     InferenceError,
@@ -449,19 +449,18 @@ def _infer_instance_from_annotation(
         yield klass.instantiate_class()
 
 
-if PY37_PLUS:
-    AstroidManager().register_transform(
-        ClassDef, dataclass_transform, is_decorated_with_dataclass
-    )
+AstroidManager().register_transform(
+    ClassDef, dataclass_transform, is_decorated_with_dataclass
+)
 
-    AstroidManager().register_transform(
-        Call,
-        inference_tip(infer_dataclass_field_call, raise_on_overwrite=True),
-        _looks_like_dataclass_field_call,
-    )
+AstroidManager().register_transform(
+    Call,
+    inference_tip(infer_dataclass_field_call, raise_on_overwrite=True),
+    _looks_like_dataclass_field_call,
+)
 
-    AstroidManager().register_transform(
-        Unknown,
-        inference_tip(infer_dataclass_attribute, raise_on_overwrite=True),
-        _looks_like_dataclass_attribute,
-    )
+AstroidManager().register_transform(
+    Unknown,
+    inference_tip(infer_dataclass_attribute, raise_on_overwrite=True),
+    _looks_like_dataclass_attribute,
+)

astroid/brain/brain_re.py

@@ -7,7 +7,7 @@
 from astroid import context, inference_tip, nodes
 from astroid.brain.helpers import register_module_extender
 from astroid.builder import _extract_single_node, parse
-from astroid.const import PY37_PLUS, PY39_PLUS, PY311_PLUS
+from astroid.const import PY39_PLUS, PY311_PLUS
 from astroid.manager import AstroidManager
 
 
@@ -90,7 +90,6 @@ def infer_pattern_match(
     return iter([class_def])
 
 
-if PY37_PLUS:
-    AstroidManager().register_transform(
-        nodes.Call, inference_tip(infer_pattern_match), _looks_like_pattern_or_match
-    )
+AstroidManager().register_transform(
+    nodes.Call, inference_tip(infer_pattern_match), _looks_like_pattern_or_match
+)

astroid/brain/brain_subprocess.py

@@ -6,7 +6,7 @@
 
 from astroid.brain.helpers import register_module_extender
 from astroid.builder import parse
-from astroid.const import PY37_PLUS, PY39_PLUS
+from astroid.const import PY39_PLUS
 from astroid.manager import AstroidManager
 
 
@@ -17,9 +17,7 @@ def _subprocess_transform():
         self, args, bufsize=0, executable=None, stdin=None, stdout=None, stderr=None,
         preexec_fn=None, close_fds=False, shell=False, cwd=None, env=None,
         universal_newlines=False, startupinfo=None, creationflags=0, restore_signals=True,
-        start_new_session=False, pass_fds=(), *, encoding=None, errors=None"""
-    if PY37_PLUS:
-        args += ", text=None"
+        start_new_session=False, pass_fds=(), *, encoding=None, errors=None, text=None"""
     init = f"""
         def __init__({args}):
             pass"""
@@ -30,57 +28,31 @@ def __exit__(self, *args): pass
     """
     py3_args = "args = []"
 
-    if PY37_PLUS:
-        check_output_signature = """
-        check_output(
-            args, *,
-            stdin=None,
-            stderr=None,
-            shell=False,
-            cwd=None,
-            encoding=None,
-            errors=None,
-            universal_newlines=False,
-            timeout=None,
-            env=None,
-            text=None,
-            restore_signals=True,
-            preexec_fn=None,
-            pass_fds=(),
-            input=None,
-            bufsize=0,
-            executable=None,
-            close_fds=False,
-            startupinfo=None,
-            creationflags=0,
-            start_new_session=False
-        ):
-        """.strip()
-    else:
-        check_output_signature = """
-        check_output(
-            args, *,
-            stdin=None,
-            stderr=None,
-            shell=False,
-            cwd=None,
-            encoding=None,
-            errors=None,
-            universal_newlines=False,
-            timeout=None,
-            env=None,
-            restore_signals=True,
-            preexec_fn=None,
-            pass_fds=(),
-            input=None,
-            bufsize=0,
-            executable=None,
-            close_fds=False,
-            startupinfo=None,
-            creationflags=0,
-            start_new_session=False
-        ):
-        """.strip()
+    check_output_signature = """
+    check_output(
+        args, *,
+        stdin=None,
+        stderr=None,
+        shell=False,
+        cwd=None,
+        encoding=None,
+        errors=None,
+        universal_newlines=False,
+        timeout=None,
+        env=None,
+        text=None,
+        restore_signals=True,
+        preexec_fn=None,
+        pass_fds=(),
+        input=None,
+        bufsize=0,
+        executable=None,
+        close_fds=False,
+        startupinfo=None,
+        creationflags=0,
+        start_new_session=False
+    ):
+    """.strip()
 
     code = textwrap.dedent(
         f"""

astroid/brain/brain_typing.py

@@ -8,7 +8,7 @@
 
 from astroid import context, extract_node, inference_tip
 from astroid.builder import _extract_single_node
-from astroid.const import PY37_PLUS, PY38_PLUS, PY39_PLUS
+from astroid.const import PY38_PLUS, PY39_PLUS
 from astroid.exceptions import (
     AttributeInferenceError,
     InferenceError,
@@ -148,22 +148,16 @@ def infer_typing_attr(
     except (InferenceError, StopIteration) as exc:
         raise UseInferenceDefault from exc
 
-    if (
-        not value.qname().startswith("typing.")
-        or PY37_PLUS
-        and value.qname() in TYPING_ALIAS
-    ):
-        # If typing subscript belongs to an alias
-        # (PY37+) handle it separately.
+    if not value.qname().startswith("typing.") or value.qname() in TYPING_ALIAS:
+        # If typing subscript belongs to an alias handle it separately.
         raise UseInferenceDefault
 
-    if (
-        PY37_PLUS
-        and isinstance(value, ClassDef)
-        and value.qname()
-        in {"typing.Generic", "typing.Annotated", "typing_extensions.Annotated"}
-    ):
-        # With PY37+ typing.Generic and typing.Annotated (PY39) are subscriptable
+    if isinstance(value, ClassDef) and value.qname() in {
+        "typing.Generic",
+        "typing.Annotated",
+        "typing_extensions.Annotated",
+    }:
+        # typing.Generic and typing.Annotated (PY39) are subscriptable
         # through __class_getitem__. Since astroid can't easily
         # infer the native methods, replace them for an easy inference tip
         func_to_add = _extract_single_node(CLASS_GETITEM_TEMPLATE)
@@ -424,10 +418,9 @@ def infer_typing_cast(
         ClassDef, inference_tip(infer_old_typedDict), _looks_like_typedDict
     )
 
-if PY37_PLUS:
-    AstroidManager().register_transform(
-        Call, inference_tip(infer_typing_alias), _looks_like_typing_alias
-    )
-    AstroidManager().register_transform(
-        Call, inference_tip(infer_special_alias), _looks_like_special_alias
-    )
+AstroidManager().register_transform(
+    Call, inference_tip(infer_typing_alias), _looks_like_typing_alias
+)
+AstroidManager().register_transform(
+    Call, inference_tip(infer_special_alias), _looks_like_special_alias
+)

astroid/const.py

@@ -6,9 +6,7 @@
 import sys
 from pathlib import Path
 
-PY36 = sys.version_info[:2] == (3, 6)
 PY38 = sys.version_info[:2] == (3, 8)
-PY37_PLUS = sys.version_info >= (3, 7)
 PY38_PLUS = sys.version_info >= (3, 8)
 PY39_PLUS = sys.version_info >= (3, 9)
 PY310_PLUS = sys.version_info >= (3, 10)

astroid/nodes/scoped_nodes/scoped_nodes.py

@@ -13,7 +13,17 @@
 import sys
 import typing
 import warnings
-from typing import TYPE_CHECKING, Dict, List, Optional, Set, TypeVar, Union, overload
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    List,
+    NoReturn,
+    Optional,
+    Set,
+    TypeVar,
+    Union,
+    overload,
+)
 
 from astroid import bases
 from astroid import decorators as decorators_mod
@@ -44,12 +54,6 @@
 from astroid.nodes.scoped_nodes.utils import builtin_lookup
 from astroid.nodes.utils import Position
 
-if sys.version_info >= (3, 6, 2):
-    from typing import NoReturn
-else:
-    from typing_extensions import NoReturn
-
-
 if sys.version_info >= (3, 8):
     from functools import cached_property
     from typing import Literal