inspect.signature: Use enum for parameter kind constants. Closes #19573
Patch by Antony Lee.
diff --git a/Lib/inspect.py b/Lib/inspect.py
index c7a2cf8..6054c39 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -32,6 +32,7 @@
'Yury Selivanov <yselivanov@sprymix.com>')
import ast
+import enum
import importlib.machinery
import itertools
import linecache
@@ -2027,24 +2028,22 @@
pass
-class _ParameterKind(int):
- def __new__(self, *args, name):
- obj = int.__new__(self, *args)
- obj._name = name
- return obj
+class _ParameterKind(enum.IntEnum):
+ POSITIONAL_ONLY = 0
+ POSITIONAL_OR_KEYWORD = 1
+ VAR_POSITIONAL = 2
+ KEYWORD_ONLY = 3
+ VAR_KEYWORD = 4
def __str__(self):
- return self._name
-
- def __repr__(self):
- return '<_ParameterKind: {!r}>'.format(self._name)
+ return self._name_
-_POSITIONAL_ONLY = _ParameterKind(0, name='POSITIONAL_ONLY')
-_POSITIONAL_OR_KEYWORD = _ParameterKind(1, name='POSITIONAL_OR_KEYWORD')
-_VAR_POSITIONAL = _ParameterKind(2, name='VAR_POSITIONAL')
-_KEYWORD_ONLY = _ParameterKind(3, name='KEYWORD_ONLY')
-_VAR_KEYWORD = _ParameterKind(4, name='VAR_KEYWORD')
+_POSITIONAL_ONLY = _ParameterKind.POSITIONAL_ONLY
+_POSITIONAL_OR_KEYWORD = _ParameterKind.POSITIONAL_OR_KEYWORD
+_VAR_POSITIONAL = _ParameterKind.VAR_POSITIONAL
+_KEYWORD_ONLY = _ParameterKind.KEYWORD_ONLY
+_VAR_KEYWORD = _ParameterKind.VAR_KEYWORD
class Parameter: