diff options
Diffstat (limited to 'astroid/arguments.py')
| -rw-r--r-- | astroid/arguments.py | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/astroid/arguments.py b/astroid/arguments.py index 5670fa8..6483189 100644 --- a/astroid/arguments.py +++ b/astroid/arguments.py @@ -141,9 +141,18 @@ class CallSite(object): return values def infer_argument(self, funcnode, name, context): - """infer a function argument value according to the call context""" + """infer a function argument value according to the call context + + Arguments: + funcnode: The function being called. + name: The name of the argument whose value is being inferred. + context: TODO + """ if name in self.duplicated_keywords: - raise exceptions.InferenceError(name) + raise exceptions.InferenceError('The arguments passed to {func!r} ' + ' have duplicate keywords.', + call_site=self, func=funcnode, + arg=name, context=context) # Look into the keywords first, maybe it's already there. try: @@ -154,7 +163,11 @@ class CallSite(object): # Too many arguments given and no variable arguments. if len(self.positional_arguments) > len(funcnode.args.args): if not funcnode.args.vararg: - raise exceptions.InferenceError(name) + raise exceptions.InferenceError('Too many positional arguments ' + 'passed to {func!r} that does ' + 'not have *args.', + call_site=self, func=funcnode, + arg=name, context=context) positional = self.positional_arguments[:len(funcnode.args.args)] vararg = self.positional_arguments[len(funcnode.args.args):] @@ -204,7 +217,13 @@ class CallSite(object): # It wants all the keywords that were passed into # the call site. if self.has_invalid_keywords(): - raise exceptions.InferenceError + raise exceptions.InferenceError( + "Inference failed to find values for all keyword arguments " + "to {func!r}: {unpacked_kwargs!r} doesn't correspond to " + "{keyword_arguments!r}.", + keyword_arguments=self.keyword_arguments, + unpacked_kwargs = self._unpacked_kwargs, + call_site=self, func=funcnode, arg=name, context=context) kwarg = nodes.Dict(lineno=funcnode.args.lineno, col_offset=funcnode.args.col_offset, parent=funcnode.args) @@ -215,7 +234,13 @@ class CallSite(object): # It wants all the args that were passed into # the call site. if self.has_invalid_arguments(): - raise exceptions.InferenceError + raise exceptions.InferenceError( + "Inference failed to find values for all positional " + "arguments to {func!r}: {unpacked_args!r} doesn't " + "correspond to {positional_arguments!r}.", + positional_arguments=self.positional_arguments, + unpacked_args=self._unpacked_args, + call_site=self, func=funcnode, arg=name, context=context) args = nodes.Tuple(lineno=funcnode.args.lineno, col_offset=funcnode.args.col_offset, parent=funcnode.args) @@ -227,4 +252,6 @@ class CallSite(object): return funcnode.args.default_value(name).infer(context) except exceptions.NoDefault: pass - raise exceptions.InferenceError(name) + raise exceptions.InferenceError('No value found for argument {name} to ' + '{func!r}', call_site=self, + func=funcnode, arg=name, context=context) |