Lambdas can contain yields, do not warn about them.

Closes #123259

4 files changed, 10 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 9017977..70421b4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -17,6 +17,8 @@ ChangeLog for PyLint
     * #123285: apply pragmas for warnings attached to lines to
       physical source code lines
 
+    * #123259: do not emit E0105 for yield expressions inside lambdas
+
     * Simplify checks for dangerous default values by unifying tests
       for all different mutable compound literals.
 
diff --git a/checkers/base.py b/checkers/base.py
index ca25b76..5cc2a30 100644
--- a/checkers/base.py
+++ b/checkers/base.py
@@ -211,7 +211,7 @@ class BasicErrorChecker(_BasicChecker):
 
     @check_messages('E0105')
     def visit_yield(self, node):
-        if not isinstance(node.frame(), astng.Function):
+        if not isinstance(node.frame(), (astng.Function, astng.Lambda)):
             self.add_message('E0105', node=node)
 
     @check_messages('E0103')
diff --git a/test/input/func_e0101.py b/test/input/func_e0101.py
index a101917..0bc86e3 100644
--- a/test/input/func_e0101.py
+++ b/test/input/func_e0101.py
@@ -27,3 +27,9 @@ class MyClass4:
 
     def __init__(self):
         yield None
+
+class MyClass5:
+    """dummy class"""
+
+    def __init__(self):
+        self.callable = lambda: (yield None)
diff --git a/test/input/func_yield_outside_func.py b/test/input/func_yield_outside_func.py
index 79d882e..c1ea3bd 100644
--- a/test/input/func_yield_outside_func.py
+++ b/test/input/func_yield_outside_func.py
@@ -2,3 +2,4 @@
 __revision__ = None
 yield 1
 
+LAMBDA_WITH_YIELD = lambda: (yield)