Hi,
I am trying to create a PTransform to combine avro schemas. But I met
`json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)`,
I think It is related to
https://github.com/apache/avro/blob/master/lang/py3/avro/schema.py#L1058 .
Because avro didn't implement __ne__, it will use __eq__ delegated.
Then I saw there is `without_default` method in CombineGlobally, so I add
that. Now I get `xception: Attempting to map key 'b' to value
<avro.schema.Field object at 0x7f71b435ec50> in ImmutableDict {} [while
running 'WriteToAvro/_WriteToAvroWithNoSchema/WriteBundles']`.
Does anyone have this problem before? I am using python3 with apache-beam
2.12.0(the latest one)?
It works fine under python2, but can't work under python3.
Thanks,
Chengxuan
