How to get 'type' field descriptor from ctypes Structure or Union field

Question

I have a structure with different datatype fields. I would like to iterate through the structure fields, check the datatype, and set the field with an appropriate value.

Answer 1

Just use the _fields_ list:

>>> for f,t in A._fields_:
...  a = getattr(A,f)
...  print a,a.offset,a.size,t
...
 0 4 
 4 1 
 5 1