merge 3.3 (closes #20108)

Doc/library/inspect.rst

@@ -753,7 +753,7 @@ Classes and functions
    metatype is in use, cls will be the first element of the tuple.
 
 
-.. function:: getcallargs(func[, *args][, **kwds])
+.. function:: getcallargs(func, *args, **kwds)
 
    Bind the *args* and *kwds* to the argument names of the Python function or
    method *func*, as if it was called with them. For bound methods, bind also the

Lib/inspect.py

@@ -1087,12 +1087,14 @@ def _too_many(f_name, args, kwonly, varargs, defcount, given, values):
             (f_name, sig, "s" if plural else "", given, kwonly_sig,
              "was" if given == 1 and not kwonly_given else "were"))
 
-def getcallargs(func, *positional, **named):
+def getcallargs(*func_and_positional, **named):
     """Get the mapping of arguments to values.
 
     A dict is returned, with keys the function argument names (including the
     names of the * and ** arguments, if any), and values the respective bound
     values from 'positional' and 'named'."""
+    func = func_and_positional[0]
+    positional = func_and_positional[1:]
     spec = getfullargspec(func)
     args, varargs, varkw, defaults, kwonlyargs, kwonlydefaults, ann = spec
     f_name = func.__name__

Misc/NEWS

@@ -46,6 +46,8 @@ Library
 
 - Fix breakage in TestSuite.countTestCases() introduced by issue #11798.
 
+- Issue #20108: Avoid parameter name clash in inspect.getcallargs().
+
 - Issue #19918: Fix PurePath.relative_to() under Windows.
 
 - Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl