Use Py_RETURN_NONE to auto-handle refcount
Use Py_RETURN_NONE to auto-handle refcount

cjdrake/pyeda,sschnug/pyeda,cjdrake/pyeda,GtTmy/pyeda,karissa/pyeda,sschnug/pyeda,pombredanne/pyeda,sschnug/pyeda,karissa/pyeda,cjdrake/pyeda,GtTmy/pyeda,pombredanne/pyeda,karissa/pyeda,pombredanne/pyeda,GtTmy/pyeda