chore: import upstream snapshot with attribution

python/ray/_private/thirdparty/pathspec/compat.py

@@ -0,0 +1,38 @@
+# encoding: utf-8
+"""
+This module provides compatibility between Python 2 and 3. Hardly
+anything is used by this project to constitute including `six`_.
+
+.. _`six`: http://pythonhosted.org/six
+"""
+
+import sys
+
+if sys.version_info[0] < 3:
+	# Python 2.
+	unicode = unicode
+	string_types = (basestring,)
+
+	from collections import Iterable
+	from itertools import izip_longest
+
+	def iterkeys(mapping):
+		return mapping.iterkeys()
+
+else:
+	# Python 3.
+	unicode = str
+	string_types = (unicode,)
+
+	from collections.abc import Iterable
+	from itertools import zip_longest as izip_longest
+
+	def iterkeys(mapping):
+		return mapping.keys()
+
+try:
+	# Python 3.6+.
+	from collections.abc import Collection
+except ImportError:
+	# Python 2.7 - 3.5.
+	from collections import Container as Collection