""" nFromAddress.py
"""

import numpy
import time, sys
def fromaddress(address, dtype, shape, strides=None):
    """ Create a numpy array from an integer address, a dtype 
    or dtype string, a shape tuple, and possibly strides.
    """
    # Make sure our dtype is a dtype, not just "f" or whatever.
    dtype = numpy.dtype(dtype)

    class Dummy(object):
        pass
    d = Dummy()
    d.__array_interface__ = dict(
        data = (address, False),
        typestr = dtype.str,
        descr = dtype.descr,
        shape = shape,
        strides = strides,
        version = 3,
    )
    return numpy.asarray(d)


nAddress = sys.argv[1]
print 'recvd addr', nAddress
a3 = fromaddress(nAddress, numpy.int16, (4,))

## any of the following cause a Python/Windows error on access
print a3
#a3[0] = 5