[SciPy-dev] Import problem in scipy.interpolate.lagrange

[Nils Wagner]

On Wed, 26 Mar 2008 12:08:30 -0500
  "Rhys Ulerich" <rhys.ulerich@gmail.com> wrote:
> Hi all,
> 
> scipy/interpolate/interpolate.py is missing an import 
>for numpy.poly1d.
> 
> Python 2.5 (r25:51908, Nov  6 2007, 15:55:44)
> [GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
> Type "help", "copyright", "credits" or "license" for 
>more information.
>>>> import scipy
>>>> import scipy.interpolate
>>>> scipy.interpolate.lagrange([0.0,1.0],[1.0,0.0])
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File
> "/usr/lib64/python2.5/site-packages/scipy/interpolate/interpolate.py", 
>line
> 30, in lagrange
>    p = poly1d(0.0)
> NameError: global name 'poly1d' is not defined
> 
> The problem still appears in svn trunk:
> http://svn.scipy.org/svn/scipy/trunk/scipy/interpolate/interpolate.py
> It can (I think) be fixed by adding 'poly1d' into the 
>'from numpy import...'
> list.  It looks like the problem
> has existed since changeset 3068.
> 
> How can I get a SciPy Trac login so I can file this 
>ticket?
> 
> - Rhys

See

http://www.scipy.org/BugReport

for details. BTW, I can confirm the bug

>>> import scipy
>>> import scipy.interpolate
>>> scipy.interpolate.lagrange([0.0,1.0],[1.0,0.0])
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File 
"/usr/lib/python2.4/site-packages/scipy/interpolate/interpolate.py", 
line 30, in lagrange
     p = poly1d(0.0)
NameError: global name 'poly1d' is not defined
>>> scipy.__version__
'0.7.0.dev4050'


HTH,
        Nils