inspect.Signature.bind: Fix pos-only params with defaults; fix *args in named args #19140
Initial patch by Yann Kaiser (epsy).
diff --git a/Lib/inspect.py b/Lib/inspect.py
index 0e41626..c3fecb8 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -2258,6 +2258,8 @@
parameters_ex = (param,)
break
else:
+ # No default, not VAR_KEYWORD, not VAR_POSITIONAL,
+ # not in `kwargs`
if partial:
parameters_ex = (param,)
break
@@ -2296,19 +2298,17 @@
# keyword arguments
kwargs_param = None
for param in itertools.chain(parameters_ex, parameters):
- if param.kind == _POSITIONAL_ONLY:
- # This should never happen in case of a properly built
- # Signature object (but let's have this check here
- # to ensure correct behaviour just in case)
- raise TypeError('{arg!r} parameter is positional only, '
- 'but was passed as a keyword'. \
- format(arg=param.name))
-
if param.kind == _VAR_KEYWORD:
# Memorize that we have a '**kwargs'-like parameter
kwargs_param = param
continue
+ if param.kind == _VAR_POSITIONAL:
+ # Named arguments don't refer to '*args'-like parameters.
+ # We only arrive here if the positional arguments ended
+ # before reaching the last parameter before *args.
+ continue
+
param_name = param.name
try:
arg_val = kwargs.pop(param_name)