Hi,
I am facing a problem with oneof {} inside a nested message and Python 3.7
(not sure whether it is limited to Python 3.7 or even to Python in
general). Example:
*demo.proto*
syntax = "proto3";
package oneofInsideNestedMessage;
message outside {
message inside {
oneof dummyName {
MsgA a = 1;
MsgB b = 2;
}
}
}
message MsgA {
string text = 1;
}
message MsgB {
uint32 number = 1;
}
*demo.py:*
from demo_pb2 import outside
msg = outside()
msg.inside.a.text = 'test'
*Result:*
I expect that this will
a) choose MsgA as type for the oneof {
b) set text field to 'test'
What actually happens:
Traceback (most recent call last):
File "<ipython-input-6-da73825bef90>", line 1, in <module>
runfile('.../demo.py', wdir='...')
File "...\site-packages\spyder_kernels\customize\spydercustomize.py",
line 827, in runfile
execfile(filename, namespace)
File "...\site-packages\spyder_kernels\customize\spydercustomize.py",
line 110, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)
File ".../demo.py", line 11, in <module>
msg.inside.a.text = 'test'
AttributeError: '_FieldProperty' object has no attribute 'text'
It does *not *happen when oneof is located in "outside" only when in
"inside". As I want to switch an existing format to protobuf I do not want
to change the structure of the data as this would break existing
application code. Is this considered a bug (i.e., will go away eventually)
or is this a limitation that will remain?
Best regards and thanks for making protobuf available publicly,
Adrian
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