[Numpy-discussion] Converting a list

Robert Kern robert.kern at gmail.com
Mon Jul 10 04:57:51 CDT 2006


Nils Wagner wrote:
> Hi all,
> 
> I have a list consisting of arrays of different size
> 
> data =  [array([-1.        +0.j, -1.33333333+0.j, -1.66666667+0.j]),
> array([-2.+0.j        , -2.-0.66666667j, -2.-1.33333333j]),
> array([-2.        -2.j, -1.33333333-2.j, -0.66666667-2.j]), array([
> 0.-2.j        ,  0.-1.66666667j,  0.-1.33333333j]), array([ 
> 6.12323400e-17-1.j        ,  -2.58819045e-01-0.96592583j,
>         -5.00000000e-01-0.8660254j ,  -7.07106781e-01-0.70710678j,
>         -8.66025404e-01-0.5j       ,  -9.65925826e-01-0.25881905j])]
> 
> type(data) =  <type 'list'>
> 
> shape(data) results in
> 
> shape(data) =
> Traceback (most recent call last):
>   File "sinai.py", line 107, in ?
>     p = polygon(P)
>   File "sinai.py", line 67, in polygon
>     print 'shape(data) = ',shape(data)
>   File "/usr/lib64/python2.4/site-packages/numpy/core/fromnumeric.py",
> line 258, in shape
>     result = asarray(a).shape
>   File "/usr/lib64/python2.4/site-packages/numpy/core/numeric.py", line
> 119, in asarray
>     return array(a, dtype, copy=False, order=order)
> TypeError: a float is required
> 
> Is this a bug ?

The error message is unhelpful, certainly, but the *fact* that an exception is 
raised is not a bug.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco





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