Some cygdb commands don't work: Can't view cython variables

[seventhunders]

I have a large cython module that I want to debug interactively,  and ultimately view the contents of some numpy arrays.

My project is using python3.  I am using the debug version  python3-dbg to build the project and I do have the debug version of numpy installed.

I am on linux mint 18.3,  cython v 0.28.1 and gdb version 8.1 .

  I am able to set breakpoints and step through the code.  However I can not view cython variables,  and have no idea how to view a numpy array.

One can see the current set of local variables,  which are all cdef defined.

(e.g.

cdef np.ndarray Gs = self.sprdUp(Strain)

cdef int Ktrain = Strain.shape[2]  )

(gdb) cy locals

Gs     = (PyArrayObject *) 0x7fffcb24f2c0

Ktrain = (int) 16

self   = (struct __pyx_obj_12polarnetwork_network *) 0x7fffcb245218

However it is impossible to view these variables using normal means.  For example:

(gdb) cy print Ktrain

Python Exception <type 'exceptions.AttributeError'> 'PyDictObjectPtr' object has no attribute 'items': 

Error occurred in Python command: 'PyDictObjectPtr' object has no attribute 'items'

Instead I have to print the C variable name to see it.

(gdb) print __pyx_v_Ktrain

$5 = 16

However what I really need is to print values of Gs

(gdb) cy print Gs[0,0,0,0]

Python Exception <type 'exceptions.AttributeError'> 'PyDictObjectPtr' object has no attribute 'items': 

Error occurred in Python command: 'PyDictObjectPtr' object has no attribute 'items'

I get a similiar dictionary error with other cy commands, e.g.

(gdb) cy global

Python Exception <type 'exceptions.AttributeError'> 'PyDictObjectPtr' object has no attribute 'items': 

Error occurred in Python command: 'PyDictObjectPtr' object has no attribute 'items'

It appears to be hopeless,  unless I can somehow dereference the PyArrayObject pointer via straight C debugging.

Why is this happening and what is a good work-around?