bpo-30299: Display a bytecode when compile a regex in debug mode. (#1491)
`re.compile(..., re.DEBUG)` now displays the compiled bytecode in
human readable form.
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index 5d36b54..1bb2654 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -1688,10 +1688,12 @@
self.assertEqual(m.group(1), "")
self.assertEqual(m.group(2), "y")
+ @cpython_only
def test_debug_flag(self):
pat = r'(\.)(?:[ch]|py)(?(1)$|: )'
with captured_stdout() as out:
re.compile(pat, re.DEBUG)
+ self.maxDiff = None
dump = '''\
SUBPATTERN 1 0 0
LITERAL 46
@@ -1707,6 +1709,31 @@
ELSE
LITERAL 58
LITERAL 32
+
+ 0. INFO 8 0b1 2 5 (to 9)
+ prefix_skip 0
+ prefix [0x2e] ('.')
+ overlap [0]
+ 9: MARK 0
+11. LITERAL 0x2e ('.')
+13. MARK 1
+15. BRANCH 10 (to 26)
+17. IN 6 (to 24)
+19. LITERAL 0x63 ('c')
+21. LITERAL 0x68 ('h')
+23. FAILURE
+24: JUMP 9 (to 34)
+26: branch 7 (to 33)
+27. LITERAL 0x70 ('p')
+29. LITERAL 0x79 ('y')
+31. JUMP 2 (to 34)
+33: FAILURE
+34: GROUPREF_EXISTS 0 6 (to 41)
+37. AT END
+39. JUMP 5 (to 45)
+41: LITERAL 0x3a (':')
+43. LITERAL 0x20 (' ')
+45: SUCCESS
'''
self.assertEqual(out.getvalue(), dump)
# Debug output is output again even a second time (bypassing