Exempt ``yield from`` from ``*-not-iterating`` Python 3 checks.

Close #2643

3 files changed, 14 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 22726dceb..8a3779b87 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,6 +13,10 @@ Release date: TBA
 
   Close #2558
 
+* Exempt ``yield from`` from ``*-not-iterating`` Python 3 checks.
+
+  Close #2643
+
 * Fix incorrect generation of ``no-else-return`` warnings (R1705)
 
   Fixed issue where ``if`` statements with nested ``if`` statements
diff --git a/pylint/checkers/python3.py b/pylint/checkers/python3.py
index 572e22024..f76bb0050 100644
--- a/pylint/checkers/python3.py
+++ b/pylint/checkers/python3.py
@@ -143,6 +143,9 @@ def _in_iterating_context(node):
         and parent.ops[0][0] == "in"
     ):
         return True
+    # Also if it's an `yield from`, that's fair
+    elif isinstance(parent, astroid.YieldFrom):
+        return True
     return False
 
 
diff --git a/pylint/test/unittest_checker_python3.py b/pylint/test/unittest_checker_python3.py
index fc727bf3c..3b0ebcb33 100644
--- a/pylint/test/unittest_checker_python3.py
+++ b/pylint/test/unittest_checker_python3.py
@@ -103,6 +103,12 @@ class TestPython3Checker(testutils.CheckerTestCase):
         with self.assertNoMessages():
             self.walk(module)
 
+    def as_iterable_in_yield_from(self, fxn):
+        code = "yield from {}()".format(fxn)
+        module = astroid.parse(code)
+        with self.assertNoMessages():
+            self.walk(module)
+
     def as_used_in_variant_in_genexp_test(self, fxn):
         checker = "{}-builtin-not-iterating".format(fxn)
         node = astroid.extract_node(
@@ -202,6 +208,7 @@ class TestPython3Checker(testutils.CheckerTestCase):
         self.as_iterable_in_unpacking(fxn)
         self.as_assignment(fxn)
         self.as_argument_to_materialized_filter(fxn)
+        self.as_iterable_in_yield_from(fxn)
 
         for func in (
             "iter",