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Helper class for (de)serialization of objects using Apache Avro

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AvroObject’s documentation!

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Examples

AvroObject

class avro_object.AvroObject(data, schema=None)

Helper class for AVRO objects

  • Parameters

    • data (JSON as string*, Dict object, Filename/URL as string with JSON content, *Avro as bytes with binary serialized content) – (un)serialized data

    • schema (JSON as string*, Dict object, *Filename/URL as string with JSON content) – Avro schema

property data()

  • Returns

    Native unserialized data

  • Return type

    dict

property json()

  • Returns

    JSON serialized data

  • Return type

    str

property last_error()

  • Returns

    Last error message

  • Return type

    str

property ok()

  • Returns

    Avro Object successfull creation

  • Return type

    bool

property origin()

  • Returns

    Source of data (str, file, URL, Avro binary)

  • Return type

    str

property schema_origin()

  • Returns

    Source of schema (str, file, URL)

  • Return type

    str

to_avro()

  • Returns

    AVRO bytes serialized data (when schema is informed)

  • Return type

    bytes

to_json()

  • Returns

    JSON serialized data

  • Return type

    str

AvroTools

class avro_object.AvroTools()

Tools for AvroObject

classmethod add_fetch_method(method)

Add custom fetch method

  • Parameters

    method – (str source) -> (bool Success, str JSON/Error, str origin name)

  • Returns

    Success

  • Return type

    bool

static create_schema(data: dict, name: str, namespace: str = 'namespace.test', doc: str = None)

Create schema from object (incomplete)

  • Parameters

    • data – source object

    • name – Name of schema

    • namespace – Namespace of schema

    • doc – Documentation

  • Returns

    Schema

  • Return type

    dict

classmethod fetch_json(source: str)

Load JSON string from various medium and returns as string

  • Parameters

    source – string JSON, file name, URL, another registered source by add_fetch_method

  • Return type

    tuple (bool Success, str JSON or error message, origin)

static fetch_json_file(source: str)

Try to parse json from file

  • Parameters

    source – str with file name

  • Returns

    (bool Success, str JSON or Error, origin)

static fetch_json_url(source: str)

Try to parse json from url

  • Parameters

    source – str with URL

  • Returns

    (bool Success, str JSON or Error, origin)

classmethod reset_fetch_methods()

Resets default fetch methods (File, URL and string)

Author

©2019, Guionardo Furlan

https://github.com/guionardo

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