Handle additional keyword arguments when checking for unnecessary-lambdas.

3 files changed, 10 insertions, 2 deletions

diff --git a/pylint/checkers/base.py b/pylint/checkers/base.py
index c9b9f1f..f698016 100644
--- a/pylint/checkers/base.py
+++ b/pylint/checkers/base.py
@@ -784,6 +784,13 @@ functions, methods
         # ordinary_args[i].name == call.args[i].name.
         if len(ordinary_args) != len(call.args):
             return
+        # Verify that the call uses keyword values that aren't
+        # defined by the lambda arguments.
+        for kwarg in call.keywords or []:
+            if (not node.args.parent_of(kwarg.value)
+                    and not isinstance(kwarg.value, astroid.Const)):
+                return
+
         for i in range(len(ordinary_args)):
             if not isinstance(call.args[i], astroid.Name):
                 return
diff --git a/pylint/checkers/utils.py b/pylint/checkers/utils.py
index bc790c5..1aac4b0 100644
--- a/pylint/checkers/utils.py
+++ b/pylint/checkers/utils.py
@@ -416,10 +416,10 @@ def get_argument_from_call(callfunc_node, position=None, keyword=None):
     """
     if position is None and keyword is None:
         raise ValueError('Must specify at least one of: position or keyword.')
-    if position is not None:        
+    if position is not None:
         try:
             return callfunc_node.args[position]
-        except IndexError as error:
+        except IndexError:
             pass
     if keyword and callfunc_node.keywords:
         for arg in callfunc_node.keywords:
diff --git a/pylint/test/functional/unnecessary_lambda.py b/pylint/test/functional/unnecessary_lambda.py
index fa1e122..4617109 100644
--- a/pylint/test/functional/unnecessary_lambda.py
+++ b/pylint/test/functional/unnecessary_lambda.py
@@ -45,6 +45,7 @@ _ = lambda list_arg, *args: _ANYARGS(args, *list_arg)
 _ = lambda: _ANYARGS(*[3])

 _ = lambda: _ANYARGS(**{'three': 3})

 _ = lambda: _ANYARGS(*[3], **{'three': 3})

+_ = lambda: _ANYARGS(func=42)

 

 # Don't warn about this.

 _ = lambda: code().analysis()