Python 3.7 / Cython 28.5 build fails

[tronje]

I'm trying to build this with Python 3.7 and Cython 28.5.
python setup.py install gives several compilation errors related to the new Python 3.7 C-API.
I understand that I seem to need to run the update_cpp.sh script. This gives me a Cython compilation error, which is fixed by the below patch. Re-generating the C++ files then works, and so does installing the package. I'm hesitant to open a pull request because a) there are enormous changes to the checked-in C++ files, and b) I'm not sure if my change is a very good idea. I'm not too familiar with Cython, unfortunately. Maybe someone can help me out.

The aforementioned patch:

diff --git a/src/dawg.pyx b/src/dawg.pyx
index 133c7fc..2e05087 100644
--- a/src/dawg.pyx
+++ b/src/dawg.pyx
@@ -346,7 +346,7 @@ cdef class CompletionDAWG(DAWG):
 
         return completer.Next()
 
-    cpdef bytes tobytes(self) except +:
+    cpdef bytes tobytes(self):
         """
         Return raw DAWG content as bytes.
         """

[jdagdelen]

I think I'm having the same issues. Fix would be appreciated!

[ianozsvald]

I confirm that the above fix works with Python 3.7.3 and Cython 0.29.13.