π¬ Question: How to convert an .avro file to a .csv file in Python?
Solution:
To convert an Avro file my_file.avro
to a CSV file my_file.csv
, create a CSV writer using the csv
module and iterate over all rows using the iterator returned by fastavro.reader()
. Then write each row to a file using the writerow()
function.
Here’s an example:
from fastavro import reader import csv with open('my_file.avro', 'rb') as file_object: csv_file = csv.writer(open("my_file.csv", "w+")) head = True for x in reader(file_object): if head: # write header header = emp.keys() csv_file.writerow(header) head = False # write normal row csv_file.writerow(emp.values())
Related: This code is a modified and improved version of this source.
π‘ Avro is a data serialization framework for RPCs (remote procedure calls) that uses JSON and binary format to serialize data.
π‘ CSV stands for comma-separated values, so you have a row-based file format where values are separated by commas, and the file is named using the suffix .csv
.

While working as a researcher in distributed systems, Dr. Christian Mayer found his love for teaching computer science students.
To help students reach higher levels of Python success, he founded the programming education website Finxter.com that has taught exponential skills to millions of coders worldwide. He’s the author of the best-selling programming books Python One-Liners (NoStarch 2020), The Art of Clean Code (NoStarch 2022), and The Book of Dash (NoStarch 2022). Chris also coauthored the Coffee Break Python series of self-published books. He’s a computer science enthusiast, freelancer, and owner of one of the top 10 largest Python blogs worldwide.
His passions are writing, reading, and coding. But his greatest passion is to serve aspiring coders through Finxter and help them to boost their skills. You can join his free email academy here.