rec-avro:
Avro support for JSON and other nested data structures.
Rec-avro provides a generic Avro schema and converter functions that allow for storing nested python data structures in avro.
Tested in Python 3 only.
Installation:
$ pip3 install rec-avroUsage:
With fastavro:
from fastavro import writer, reader, schema
from rec_avro import to_rec_avro_destructive, from_rec_avro_destructive, rec_avro_schema
def json_objects():
return [{'a': 'a'}, {'b':'b'}]
# For efficiency, to_rec_avro_destructive() destroys rec, and reuses it's
# data structures to construct avro_objects
avro_objects = (to_rec_avro_destructive(rec) for rec in json_objects())
# store records in avro
with open('json_in_avro.avro', 'wb') as f_out:
writer(f_out, schema.parse_schema(rec_avro_schema()), avro_objects)
#load records from avro
with open('json_in_avro.avro', 'rb') as f_in:
# For efficiency, from_rec_avro_destructive(rec) destroys rec, and
# reuses it's data structures to construct it's output
loaded_json = [from_rec_avro_destructive(rec) for rec in reader(f_in)]
assert loaded_json == json_objects()Development:
# Running all tests:
$ python setup.py pytest
# Running tests manually
$ pip3 install fastavro pytest
$ python setup.py develop
$ pytest tests/test_rec_avro.py
