Use flake8-import-order to enforce PEP-8 compliance (#23947)

lib/spack/spack/package.py

@@ -8,8 +8,8 @@
 The spack package class structure is based strongly on Homebrew
 (http://brew.sh/), mainly because Homebrew makes it very easy to create
 packages.
-
 """
+
 import base64
 import collections
 import contextlib
@@ -25,13 +25,14 @@
 import textwrap
 import time
 import traceback
-import six
 import types
-from typing import Optional, List, Dict, Any, Callable  # novm
+from typing import Any, Callable, Dict, List, Optional  # novm
+
+import six
+from ordereddict_backport import OrderedDict
 
 import llnl.util.filesystem as fsys
 import llnl.util.tty as tty
-
 import spack.compilers
 import spack.config
 import spack.dependency
@@ -51,14 +52,13 @@
 import spack.util.web
 from llnl.util.lang import memoized
 from llnl.util.link_tree import LinkTree
-from ordereddict_backport import OrderedDict
 from spack.filesystem_view import YamlFilesystemView
-from spack.installer import PackageInstaller, InstallError
 from spack.install_test import TestFailure, TestSuite
-from spack.util.executable import which, ProcessError
-from spack.util.prefix import Prefix
-from spack.stage import stage_prefix, Stage, ResourceStage, StageComposite
+from spack.installer import InstallError, PackageInstaller
+from spack.stage import ResourceStage, Stage, StageComposite, stage_prefix
+from spack.util.executable import ProcessError, which
 from spack.util.package_hash import package_hash
+from spack.util.prefix import Prefix
 from spack.version import Version
 
 """Allowed URL schemes for spack packages."""