File storage

You can also store and read files with Python steps. This means you can upload photos, retrieve datasets, accept files from an HTTP request and more.

The /tmp directory is accessible from your workflow steps for saving and retrieving files.

You have full access to read and write both files in /tmp.

Writing a file to /tmp

import requests

# Download the Python logo
r = requests.get('https://www.python.org/static/img/python-logo@2x.png')

# Create a new file python-logo.png in the /tmp/data directory
with open('/tmp/python-logo.png', 'wb') as f:
  # Save the content of the HTTP response into the file
  f.write(r.content)

Now /tmp/python-logo.png holds the official Python logo.

Reading a file from /tmp

You can also open files you have previously stored in the /tmp directory. Let's open the python-logo.png file.

import os

with open('/tmp/python-logo.png') as f:
  # Store the contents of the file into a variable
  file_data = f.read()

Listing files in /tmp

If you need to check what files are currently in /tmp you can list them and print the results to the Logs section of Results:

import os

# Prints the files in the tmp directory
print(os.listdir('/tmp'))

/tmp limitations

The /tmp directory can store up to 2GB of storage. Also the storage may be wiped or may not exist between workflow executions.

To avoid errors, assume that the /tmp directory is empty between workflow runs. Please refer to the disk limits for details.