Python 3.10 support: collections.abc (#20441)

lib/spack/llnl/util/filesystem.py

@@ -23,6 +23,12 @@
 from llnl.util.lang import dedupe, memoized
 from spack.util.executable import Executable
 
+
+if sys.version_info >= (3, 3):
+    from collections.abc import Sequence  # novm
+else:
+    from collections import Sequence
+
 __all__ = [
     'FileFilter',
     'FileList',
@@ -1106,7 +1112,7 @@ def find(root, files, recursive=True):
 
     Parameters:
         root (str): The root directory to start searching from
-        files (str or collections.Sequence): Library name(s) to search for
+        files (str or Sequence): Library name(s) to search for
         recurse (bool, optional): if False search only root folder,
             if True descends top-down from the root. Defaults to True.
 
@@ -1169,7 +1175,7 @@ def _find_non_recursive(root, search_files):
 # Utilities for libraries and headers
 
 
-class FileList(collections.Sequence):
+class FileList(Sequence):
     """Sequence of absolute paths to files.
 
     Provides a few convenience methods to manipulate file paths.
@@ -1412,7 +1418,7 @@ def find_headers(headers, root, recursive=False):
     """
     if isinstance(headers, six.string_types):
         headers = [headers]
-    elif not isinstance(headers, collections.Sequence):
+    elif not isinstance(headers, Sequence):
         message = '{0} expects a string or sequence of strings as the '
         message += 'first argument [got {1} instead]'
         message = message.format(find_headers.__name__, type(headers))
@@ -1567,7 +1573,7 @@ def find_system_libraries(libraries, shared=True):
     """
     if isinstance(libraries, six.string_types):
         libraries = [libraries]
-    elif not isinstance(libraries, collections.Sequence):
+    elif not isinstance(libraries, Sequence):
         message = '{0} expects a string or sequence of strings as the '
         message += 'first argument [got {1} instead]'
         message = message.format(find_system_libraries.__name__,
@@ -1621,7 +1627,7 @@ def find_libraries(libraries, root, shared=True, recursive=False):
     """
     if isinstance(libraries, six.string_types):
         libraries = [libraries]
-    elif not isinstance(libraries, collections.Sequence):
+    elif not isinstance(libraries, Sequence):
         message = '{0} expects a string or sequence of strings as the '
         message += 'first argument [got {1} instead]'
         message = message.format(find_libraries.__name__, type(libraries))

lib/spack/llnl/util/lang.py

@@ -9,13 +9,18 @@
 import os
 import re
 import functools
-import collections
 import inspect
 from datetime import datetime, timedelta
 from six import string_types
 import sys
 
 
+if sys.version_info >= (3, 3):
+    from collections.abc import Hashable, MutableMapping  # novm
+else:
+    from collections import Hashable, MutableMapping
+
+
 # Ignore emacs backups when listing modules
 ignore_modules = [r'^\.#', '~$']
 
@@ -189,7 +194,7 @@ def memoized(func):
 
     @functools.wraps(func)
     def _memoized_function(*args):
-        if not isinstance(args, collections.Hashable):
+        if not isinstance(args, Hashable):
             # Not hashable, so just call the function.
             return func(*args)
 
@@ -264,7 +269,7 @@ def setter(name, value):
 
 
 @key_ordering
-class HashableMap(collections.MutableMapping):
+class HashableMap(MutableMapping):
     """This is a hashable, comparable dictionary.  Hash is performed on
        a tuple of the values in the dictionary."""