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-rw-r--r--Lib/dis.py3
-rw-r--r--Lib/test/test_dis.py9
-rw-r--r--Misc/NEWS.d/next/Library/2024-08-26-19-36-00.gh-issue-123340.mQKI1H.rst1
3 files changed, 13 insertions, 0 deletions
diff --git a/Lib/dis.py b/Lib/dis.py
index 077c403..bdac296 100644
--- a/Lib/dis.py
+++ b/Lib/dis.py
@@ -51,6 +51,7 @@ LOAD_SPECIAL = opmap['LOAD_SPECIAL']
LOAD_FAST_LOAD_FAST = opmap['LOAD_FAST_LOAD_FAST']
STORE_FAST_LOAD_FAST = opmap['STORE_FAST_LOAD_FAST']
STORE_FAST_STORE_FAST = opmap['STORE_FAST_STORE_FAST']
+IS_OP = opmap['IS_OP']
CACHE = opmap["CACHE"]
@@ -629,6 +630,8 @@ class ArgResolver:
argrepr = repr(obj)
elif deop == LOAD_SPECIAL:
argrepr = _special_method_names[arg]
+ elif deop == IS_OP:
+ argrepr = 'is not' if argval else 'is'
return argval, argrepr
def get_instructions(x, *, first_line=None, show_caches=None, adaptive=False):
diff --git a/Lib/test/test_dis.py b/Lib/test/test_dis.py
index db69bc7..ab0fcee 100644
--- a/Lib/test/test_dis.py
+++ b/Lib/test/test_dis.py
@@ -2028,6 +2028,15 @@ class InstructionTests(InstructionTestCase):
dis.dis(f.__code__, file=output, show_caches=True)
self.assertIn("L1:", output.getvalue())
+ def test_is_op_format(self):
+ output = io.StringIO()
+ dis.dis("a is b", file=output, show_caches=True)
+ self.assertIn("IS_OP 0 (is)", output.getvalue())
+
+ output = io.StringIO()
+ dis.dis("a is not b", file=output, show_caches=True)
+ self.assertIn("IS_OP 1 (is not)", output.getvalue())
+
def test_baseopname_and_baseopcode(self):
# Standard instructions
for name, code in dis.opmap.items():
diff --git a/Misc/NEWS.d/next/Library/2024-08-26-19-36-00.gh-issue-123340.mQKI1H.rst b/Misc/NEWS.d/next/Library/2024-08-26-19-36-00.gh-issue-123340.mQKI1H.rst
new file mode 100644
index 0000000..8a462b2
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-08-26-19-36-00.gh-issue-123340.mQKI1H.rst
@@ -0,0 +1 @@
+Show string value of :opcode:`IS_OP` oparg in :mod:`dis` output.