[tested by cwitty] add support for numpy arrays with integer entries

[mwhansen]

sage: import numpy
sage: a = numpy.array([[1,2],[3,4]],'int32')
sage: matrix(a)
---------------------------------------------------------------------------
<type 'exceptions.TypeError'>             Traceback (most recent call last)

/home/mhansen/sage/devel/sage-856/<ipython console> in <module>()

/home/mhansen/sage/local/lib/python2.5/site-packages/sage/matrix/constructor.py in matrix(arg0, arg1, arg2, arg3, sparse)
    399                     raise TypeError("cannot convert numpy matrix to SAGE matrix")
    400             else:
--> 401                 raise TypeError("cannot convert numpy matrix to SAGE matrix")
    402 
    403         else:

<type 'exceptions.TypeError'>: cannot convert numpy matrix to SAGE matrix

Component: numerical

Keywords: numpy

Issue created by migration from https://trac.sagemath.org/ticket/858

[mwhansen]

Attachment: 858.patch.gz

patch #1

[mwhansen]

Attachment: 858.2.patch.gz

added doctest

[mwhansen]

comment:1

#859 should be applied before these two patches