python
diff --git a/‎Lib/test/test_unparse.py‎
Lines changed: 14 additions & 0 deletions b/‎Lib/test/test_unparse.py‎
Lines changed: 14 additions & 0 deletions
diff --git a/‎Misc/NEWS.d/next/Library/2020-03-07-16-44-51.bpo-39889.3RYqeX.rst‎
Lines changed: 3 additions & 0 deletions b/‎Misc/NEWS.d/next/Library/2020-03-07-16-44-51.bpo-39889.3RYqeX.rst‎
Lines changed: 3 additions & 0 deletions
@@ -344,6 +344,20 @@ def test_simple_expressions_parens(self):
         self.check_src_roundtrip("call((yield x))")
         self.check_src_roundtrip("return x + (yield x)")
 
+    def test_subscript(self):
+        self.check_src_roundtrip("a[i]")
+        self.check_src_roundtrip("a[i,]")
+        self.check_src_roundtrip("a[i, j]")
+        self.check_src_roundtrip("a[()]")
+        self.check_src_roundtrip("a[i:j]")
+        self.check_src_roundtrip("a[:j]")
+        self.check_src_roundtrip("a[i:]")
+        self.check_src_roundtrip("a[i:j:k]")
+        self.check_src_roundtrip("a[:j:k]")
+        self.check_src_roundtrip("a[i::k]")
+        self.check_src_roundtrip("a[i:j,]")
+        self.check_src_roundtrip("a[i:j, k]")
+
     def test_docstrings(self):
         docstrings = (
             '"""simple doc string"""',
 
@@ -0,0 +1,3 @@
+Fixed :func:`ast.unparse` for extended slices containing a single element
+(e.g. ``a[i:j,]``). Remove redundant tuples when index with a tuple (e.g.
+``a[i, j]``).
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	+Fixed :func:`ast.unparse` for extended slices containing a single element
	`2`	+(e.g. ``a[i:j,]``). Remove redundant tuples when index with a tuple (e.g.
	`3`	+``a[i, j]``).