[Python-Dev] confusing exec error message in 3.0

[Michael Foord]

Georg Brandl wrote:
> Fredrik Lundh schrieb:
>   
>> (using 3.0a4)
>>
>>  >>> exec(open("file.py"))
>> Traceback (most recent call last):
>>    File "<stdin>", line 1, in <module>
>> TypeError: exec() arg 1 must be a string, file, or code object, not 
>> TextIOWrapper
>>
>> so what's "file" referring to here?
>>
>> (the above works under 2.5, of course)
>>     
>
> See http://bugs.python.org/issue1762972 -- it has been decided to drop
> that possibility.
>
> I've a patch that fixes the wrong error message in http://bugs.python.org/issue3706.
>   

In order to obtain a string from a Python source code file, honouring 
encoding cookies, the tokenize module has a 'detect_encoding' function 
that could be useful.

Michael
> Georg
>
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