topic Re: How to read a json from BytesIO with PySpark? in Data Engineering

How to read a json from BytesIO with PySpark?

Galdino — Sun, 15 May 2022 21:29:06 GMT

I want read a json from IO variable using PySpark.

My code using pandas:

io = BytesIO()

ftp.retrbinary('RETR '+ file_name, io.write)

io.seek(0)

# With pandas

df = pd.read_json(io)

What I tried using PySpark, but don't work:

io = BytesIO()

ftp.retrbinary('RETR '+ file_name, io.write)

io.seek(0)

df = spark.read\

.format("binaryfile")\ # I already tried with format "json"

.option('inferSchema', 'true')\

.option('header', 'true')\

.json(io)

Obs: Is not possible save in a file and read that after

Re: How to read a json from BytesIO with PySpark?

Noopur_Nigam — Thu, 02 Jun 2022 02:32:55 GMT

Hi @João Galdino There are below points which are incorrect in your spark read command:

1) The Syntax is wrong, it can be

df = spark.read\

.format("binaryFile")

.load("directory of file")

df = spark.read\

.format("json")

.load("directory of file")

df = spark.read

.json("directory of file")

You need to specify a file format and then provide file's path.

2) Spark expects a source file path, it does not understand BytesIO() object in read statement.

You can refer to below doc for more understanding on what are the supported sources with spark and how to read and write using them.You can refer to below doc:

https://docs.databricks.com/data/data-sources/index.html

Re: How to read a json from BytesIO with PySpark?

Anonymous — Tue, 12 Jul 2022 15:40:53 GMT

Hey there @João Galdino

Hope all is well!

Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help.

We'd love to hear from you.

Thanks!

Re: How to read a json from BytesIO with PySpark?

Erik_L — Thu, 16 Mar 2023 18:57:30 GMT

Just use pandas and follow with

spark.createDataFrame(df)