On Thursday 22 January 2009, xhao.yap...@gmail.com wrote:
> I tried to use "ctc.py" but i recieved the following error.
> can any body help me?
...
> ----------------------------------------------------------------------
> sage: attach "ctc.py"
> ---------------------------------------------------------------------------
> ImportError                               Traceback (most recent call
...
> ImportError: cannot import name MPolynomialRing

For future reference: this is not a Sage question but a question about code in 
my master's thesis. The problem you are facing is that MPolynomialRing is 
deprecated. 

Try to replace all occurrences of MPolynomialRing with PolynomialRing.

Cheers,
Martin

-- 
name: Martin Albrecht
_pgp: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x8EF0DC99
_otr: 47F43D1A 5D68C36F 468BAEBA 640E8856 D7951CCF
_www: http://www.informatik.uni-bremen.de/~malb
_jab: martinralbre...@jabber.ccc.de


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