Issue #20791: copy.copy() now doesn't make a copy when the input is a bytes object. Initial patch by Peter Otten.
diff --git a/Lib/copy.py b/Lib/copy.py
index d26bcdb..bb8840e 100644
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -110,7 +110,7 @@
def _copy_immutable(x):
return x
for t in (type(None), int, float, bool, str, tuple,
- frozenset, type, range,
+ bytes, frozenset, type, range,
types.BuiltinFunctionType, type(Ellipsis),
types.FunctionType, weakref.ref):
d[t] = _copy_immutable
diff --git a/Lib/test/test_copy.py b/Lib/test/test_copy.py
index cde0bae..eb8d18c 100644
--- a/Lib/test/test_copy.py
+++ b/Lib/test/test_copy.py
@@ -98,6 +98,7 @@
pass
tests = [None, 42, 2**100, 3.14, True, False, 1j,
"hello", "hello\u1234", f.__code__,
+ b"world", bytes(range(256)),
NewStyle, range(10), Classic, max, WithMetaclass]
for x in tests:
self.assertIs(copy.copy(x), x)