numpy.load() leads to ImportError when dolfin is imported

[Anders E. Johansen]

Using the numpy.load() module in a program which has imported dolfin leads to the following error message:

ImportError: cannot import name DEFAULT_BUFFER_SIZE

This works fine on a stable 1.0 release, but crashes with trunk.

The following program can recreate the error:

import dolfin as d
import numpy as np

filename = "a.npy"
a = np.array([0,1,2])
np.save(filename, a)
a = np.load(filename)

Anders

[Anders E. Johansen (andersej)]

This was introduced in revision 6537, so it's probably related to the splitting of the SWIG interface.

Anders

[Johan Hake (johan-hake)]

I am not sure why this happens. However prepending the following line to your script fixes the problem.

import io

What fails is the import of the io module after dolfin has been imported. Import that before dolfin and you are fine.