view_scalars no longer works with type objects

[jcrist]

This used to work in dynd 0.7.0, but doesn't work in the new release:

In [1]: from dynd import nd

In [2]: a = nd.array([1, 2, None])

In [3]: a.dtype.value_type
Out[3]:
nd.array(int32,
         type="type")

In [4]: a.view_scalars(a.dtype.value_type)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-4-8ec4eaa0d375> in <module>()
----> 1 a.view_scalars(a.dtype.value_type)

dynd/nd/array.pyx in dynd.nd.array.array.view_scalars (/Users/travis/build/libdynd/dynd-python/build/temp.macosx-10.5-x86_64-3.5/dynd/nd/array.cxx:5615)()

dynd/ndt/type.pyx in dynd.ndt.type.type.__init__ (/Users/travis/build/libdynd/dynd-python/build/temp.macosx-10.5-x86_64-3.5/dynd/ndt/type.cxx:1625)()

dynd/ndt/type.pyx in dynd.ndt.type.as_cpp_type (/Users/travis/build/libdynd/dynd-python/build/temp.macosx-10.5-x86_64-3.5/dynd/ndt/type.cxx:4819)()

TypeError: issubclass() arg 1 must be a class

In [5]: import dynd

In [6]: dynd.__version__
Out[6]: "b'f641248'"

It does work with strings though:

In [7]: a.view_scalars('int32')
Out[7]:
nd.array([          1,           2, -2147483648],
         type="3 * int32")

[jcrist]

Ah, it's because type.value_type is now an instance of nd.array. I can't seem to get the type out though.

In [49]: t = a.dtype.value_type

In [50]: t
Out[50]:
nd.array(int32,
         type="type")

In [51]: t[0]
---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-51-d0a24a012877> in <module>()
----> 1 t[0]

dynd/nd/array.pyx in dynd.nd.array.array.__getitem__ (/Users/travis/build/libdynd/dynd-python/build/temp.macosx-10.5-x86_64-3.5/dynd/nd/array.cxx:3253)()

IndexError: provided 1 indices to dynd type type, but only 0 dimensions available

In [52]: t.to(ndt.type)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-52-055b254edf25> in <module>()
----> 1 t.to(ndt.type)

dynd/nd/array.pyx in dynd.nd.array.array.to (/Users/travis/build/libdynd/dynd-python/build/temp.macosx-10.5-x86_64-3.5/dynd/nd/array.cxx:2196)()

TypeError: Can't convert 'type' object to str implicitly

In [53]: ndt.type(t)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-53-55abca7be71c> in <module>()
----> 1 ndt.type(t)

dynd/ndt/type.pyx in dynd.ndt.type.type.__init__ (/Users/travis/build/libdynd/dynd-python/build/temp.macosx-10.5-x86_64-3.5/dynd/ndt/type.cxx:1625)()

dynd/ndt/type.pyx in dynd.ndt.type.as_cpp_type (/Users/travis/build/libdynd/dynd-python/build/temp.macosx-10.5-x86_64-3.5/dynd/ndt/type.cxx:4819)()

TypeError: issubclass() arg 1 must be a class

In [54]: str(t)
Out[54]: 'nd.array(int32,\n         type="type")'

[izaid]

That's a bug (and easy to fix), will do so.