如何在python中提取avro文件的架构

问题描述

我正在尝试使用Python Avro库( https://pypi.python.org/pypi/avro )以读取由JAVA生成的AVRO文件.由于架构已经嵌入到avro文件中，为什么我需要指定架构文件?有没有办法自动将其提取?

I am trying to use the Python Avro library (https://pypi.python.org/pypi/avro) to read a AVRO file generated by JAVA. Since the schema is already embedded in the avro file, why do I need to specify a schema file? Is there a way to extract it automatically?

找到了另一个名为fastavro的软件包( https://pypi.python.org/pypi/fastavro )可以提取avro模式.手册是否通过设计在python arvo软件包中指定了架构文件?非常感谢.

Found another package called fastavro(https://pypi.python.org/pypi/fastavro) can extract avro schema. Is the manual specifying schema file in python arvo package by design? Thank you very much.

推荐答案

我使用python 3.4和Avro软件包1.7.7

I use python 3.4 and Avro package 1.7.7

对于架构文件，请使用:

For schema file use:

reader = avro.datafile.DataFileReader(open('file_name.avro',"rb"),avro.io.DatumReader())
schema = reader.meta
print(schema)

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