read csv directly from url with pyspark

[RantoB]

I would like to load a csv file directly to a spark dataframe in Databricks. I tried the following code :

url = "https://opendata.reseaux-energies.fr/explore/dataset/eco2mix-national-tr/download/?format=csv&timezone=Europe/Berlin&lang=fr&use_labels_for_header=true&csv_separator=%3B"
from pyspark import SparkFiles
spark.sparkContext.addFile(url)
df = spark.read.csv(SparkFiles.get("eco2mix-national-tr.csv"), header=True, inferSchema= True)

and I got the following error :

Path does not exist: dbfs:/local_disk0/spark-c03e8325-0ab6-4c2e-bffb-c9d290283b31/userFiles-a507dd96-cc63-4e47-9b0f-44d2a940bb10/eco2mix-national-tr.csv

Thanks

[-werners-]

Check this:

https://stackoverflow.com/questions/57014043/reading-data-from-url-using-spark-databricks-platform

Basically adding "file://" to your path.

[RantoB]

I've already read this post and tried it but this was not working either :

Path does not exist: file:/local_disk0/spark-48fd5772-d1a9-40f2-a2f2-bcad38962ed6/userFiles-0298f7e7-105c-4c8d-a845-0975edd378a0/eco2mix-national-tr.csv

[-werners- · Accepted solution]

ok so I tested it myself, and I think I found the issue:

the addfile() will not put a file called 'eco2mix-national-tr.csv', but a file called 'download'.

You can check this by using the %sh magic command and then

ls "/local_disk0/spark-.../userFiles-/"

You will get a list of files, no eco2mix but a 'download' file.

To see the contents of the download file, you can do a cat command:

%sh

cat "/local_disk0/spark-.../userFiles-.../download"

You will see the contents.

Next you have to read it with spark.read.csv AND the file:// prefix.

So this makes:

url = "https://opendata.reseaux-energies.fr/explore/dataset/eco2mix-national-tr/download/?format=csv"
 from pyspark import SparkFiles
sc.addFile(url)
 
path  = SparkFiles.get('download')
df = spark.read.csv("file://" + path, header=True, inferSchema= True, sep = ";")

This gives:

 

It is always a good idea when working with local files to actually look at the directory in question and do a cat of the file in question.

[RantoB]

Great, this is working. Thank you.

[Piper_Wilson]

@Bertrand BURCKER​ - If @Werner Stinckens​ answered your question, would you mark his as the best answer? That will help others find the solution quickly.

[User16752246494]

Hi ,

You can also use the following.

import org.apache.commons.io.IOUtils // jar will be already there in spark cluster no need to worry
import java.net.URL 
 
val urlfile=new URL("https://people.sc.fsu.edu/~jburkardt/data/csv/airtravel.csv")
  val testDummyCSV = IOUtils.toString(urlfile,"UTF-8").lines.toList.toDS()
  val testcsv = spark
                .read.option("header", true)
                .option("inferSchema", true)
                .csv(testDummyCSV)
 
display(testcsv)

[MartinIsti]

I know it's a 2 years old thread but I needed to find a solution to this very thing today. I had one notebook using SparkContext

from pyspark import SparkFiles

from pyspark.sql.functions import *

sc.addFile(url)

But according to the runtime 14 release notes: https://learn.microsoft.com/en-gb/azure/databricks/release-notes/runtime/14.0#breaking-changes sc will stop working. IOUtils hasn't been mentioned.

The current official way is:

https://docs.databricks.com/en/files/download-internet-files.html

I hope it helps.