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Created on 2020-09-30 18:55 by gousaiyang, last changed 2022-04-11 14:59 by admin. This issue is now closed.
| Messages (2) | |||
|---|---|---|---|
| msg377717 - (view) | Author: Saiyang Gou (gousaiyang) * | Date: 2020-09-30 18:55 | |
ast.parse in Python 3.9 does not produce SyntaxError for assignment to __debug__:
```
>>> import ast
>>> ast.dump(ast.parse('__debug__ = 0'))
"Module(body=[Assign(targets=[Name(id='__debug__', ctx=Store())], value=Constant(value=0))], type_ignores=[])"
>>> exec('__debug__ = 0')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<string>", line 1
SyntaxError: cannot assign to __debug__
```
In Python 3.8 a SyntaxError was properly raised. Probably this is due to the new PEG parser.
|
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| msg377721 - (view) | Author: Guido van Rossum (gvanrossum) *  |
Date: 2020-09-30 20:28 | |
We moved the check from the parser to the bytecode compiler. I don't think this should be a problem. Kudos for noticing though! :-)
```
>>> compile("__debug__ = 1", "<string>", "exec")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<string>", line 1
SyntaxError: cannot assign to __debug__
>>>
```
|
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:36 | admin | set | github: 86063 |
| 2020-09-30 20:28:55 | gvanrossum | set | status: open -> closed resolution: wont fix messages: + msg377721 stage: resolved |
| 2020-09-30 19:48:00 | serhiy.storchaka | set | nosy:
+ gvanrossum, pablogsal, BTaskaya |
| 2020-09-30 18:55:04 | gousaiyang | create | |