[Python-ideas] error in os.popen result

[Steven D'Aprano]

Hello Liam,

This is a mailing list for discussing possible future ideas for the next 
version of Python, not for general support.

I recommend that you use the python-list at python.org mailing list, also 
available via Usenet on comp.lang.python.

Good luck.




On Tue, Jul 01, 2014 at 06:31:22PM +0200, Liam Marsh wrote:
> hello, for a small server program, I wanted to know which ports were
> occuped.
> with the dos command 'netstat'
> so I tried this:
> 
> *>>>a=os.popen('netstat')*
> *>>>bytes(a.read())*
> 
> but this occured in the second step:
> 
> *Traceback (most recent call last):*
> *  File "<pyshell#20>", line 1, in <module>*
> *    bytes(a.read())*
> *  File "C:\Apps\Programmation\Python3.2\lib\encodings\cp1252.py", line 23,
> in decode*
> *    return codecs.charmap_decode(input,self.errors,decoding_table)[0]*
> *UnicodeDecodeError: 'charmap' codec can't decode byte 0x90 in position 79:
> character maps to <undefined>*
> 
> *how can I avoid it and why does the windows cmd does return an
>  undecodable character?*
> 
> *thank you.*

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