inspect.signature: Make Signature and Parameter picklable. Closes #20726

1 files changed, 20 insertions, 0 deletions

diff --git a/Lib/inspect.py b/Lib/inspect.py
index 6054c39..bce0516 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -2106,6 +2106,18 @@ class Parameter:
 
         self._partial_kwarg = _partial_kwarg
 
+    def __reduce__(self):
+        return (type(self),
+                (self._name, self._kind),
+                {'_partial_kwarg': self._partial_kwarg,
+                 '_default': self._default,
+                 '_annotation': self._annotation})
+
+    def __setstate__(self, state):
+        self._partial_kwarg = state['_partial_kwarg']
+        self._default = state['_default']
+        self._annotation = state['_annotation']
+
     @property
     def name(self):
         return self._name
@@ -2658,6 +2670,14 @@ class Signature:
         '''
         return args[0]._bind(args[1:], kwargs, partial=True)
 
+    def __reduce__(self):
+        return (type(self),
+                (tuple(self._parameters.values()),),
+                {'_return_annotation': self._return_annotation})
+
+    def __setstate__(self, state):
+        self._return_annotation = state['_return_annotation']
+
     def __str__(self):
         result = []
         render_pos_only_separator = False