Steve Stagg <stest...@gmail.com> added the comment:
Apologies, script should have read:
class B:
def __bool__(self):
print("bool(B)")
raise AttributeError("don't do that!")
b = B()
try:
if b:
pass
except AttributeError:
print("GOT ERROR")
raise IndexError("Should GET THIS")
print("SHOULDN'T GET THIS")
---
The DIS before the change for this code is:
BEFORE:
1 0 LOAD_BUILD_CLASS
2 LOAD_CONST 0 (<code object B at 0x7ff45711e710,
file "<dis>", line 1>)
4 LOAD_CONST 1 ('B')
6 MAKE_FUNCTION 0
8 LOAD_CONST 1 ('B')
10 CALL_FUNCTION 2
12 STORE_NAME 0 (B)
6 14 LOAD_NAME 0 (B)
16 CALL_FUNCTION 0
18 STORE_NAME 1 (b)
7 20 SETUP_FINALLY 8 (to 30)
8 22 LOAD_NAME 1 (b)
24 POP_JUMP_IF_FALSE 26
9 >> 26 POP_BLOCK
28 JUMP_FORWARD 30 (to 60)
10 >> 30 DUP_TOP
32 LOAD_NAME 2 (AttributeError)
34 JUMP_IF_NOT_EXC_MATCH 58
36 POP_TOP
38 POP_TOP
40 POP_TOP
11 42 LOAD_NAME 3 (print)
44 LOAD_CONST 2 ('GOT ERROR')
46 CALL_FUNCTION 1
48 POP_TOP
12 50 LOAD_NAME 4 (IndexError)
52 LOAD_CONST 3 ('Should GET THIS')
54 CALL_FUNCTION 1
56 RAISE_VARARGS 1
>> 58 RERAISE
14 >> 60 LOAD_NAME 3 (print)
62 LOAD_CONST 4 ("SHOULDN'T GET THIS")
64 CALL_FUNCTION 1
66 POP_TOP
68 LOAD_CONST 5 (None)
70 RETURN_VALUE
Disassembly of <code object B at 0x7ff45711e710, file "<dis>", line 1>:
1 0 LOAD_NAME 0 (__name__)
2 STORE_NAME 1 (__module__)
4 LOAD_CONST 0 ('B')
6 STORE_NAME 2 (__qualname__)
2 8 LOAD_CONST 1 (<code object __bool__ at
0x7ff45711e660, file "<dis>", line 2>)
10 LOAD_CONST 2 ('B.__bool__')
12 MAKE_FUNCTION 0
14 STORE_NAME 3 (__bool__)
16 LOAD_CONST 3 (None)
18 RETURN_VALUE
Disassembly of <code object __bool__ at 0x7ff45711e660, file "<dis>", line 2>:
3 0 LOAD_GLOBAL 0 (print)
2 LOAD_CONST 1 ('bool(B)')
4 CALL_FUNCTION 1
6 POP_TOP
4 8 LOAD_GLOBAL 1 (AttributeError)
10 LOAD_CONST 2 ("don't do that!")
12 CALL_FUNCTION 1
14 RAISE_VARARGS 1
----
Afterwards, tehre's a single change:
8 becomes:
8 22 LOAD_NAME 1 (b)
24 POP_TOP
----------
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42899>
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