Le 27/02/17 à 14:09, Chris Angelico a écrit :
On Mon, Feb 27, 2017 at 11:57 PM, Vincent Vande Vyvre
<vincent.vande.vy...@telenet.be> wrote:
I've this strange error:
Python 3.4.3 (default, Nov 17 2016, 01:08:31)
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
import ast
l = "print('hello world')"
ast.literal_eval(l)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.4/ast.py", line 84, in literal_eval
return _convert(node_or_string)
File "/usr/lib/python3.4/ast.py", line 83, in _convert
raise ValueError('malformed node or string: ' + repr(node))
ValueError: malformed node or string: <_ast.Call object at 0x7fcf955871d0>
Is it an import question ?
The message is a little confusing, but the error comes from the fact
that literal_eval permits a very few legal operations, and calling a
function isn't one of them. So when you try to evaluate the "literal"
that you've given it, you get back an error saying that a Call is
'malformed'. More accurate would be to say that it's not permitted.
ChrisA
OK, it's coherent with the secure execution.
Thanks
Vincent
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