By Rory McEwan
I’m trying to deploy a Python function to Functions that requires packages to be imported.
The following is the tree of my directory
ingest-attempt2
│ .gitignore
│ project.yml
│
├───.deployed
│ versions.json
│
└───packages
└───sample
└───hello
requirements.txt
__deployer__.zip
__main__.py
This is my requirements.txt
numpy
…and this is my project.yml
parameters: {}
environment: {}
packages:
- name: sample
shared: false
environment: {}
parameters: {}
annotations: {}
functions:
- name: hello
binary: false
main: "main"
runtime: python:default
web: true
webSecure: false
parameters: {}
environment: {}
annotations: {}
limits: {}
When I run the function in DigitalOcean, I get the following error
2025-09-02T20:09:16.864955434Z stderr: Invalid function: No module named 'numpy'
I can see that someone has asked a similar question here but I don’t think I have made a mistake with my folder names as this person has.
Please could someone enlighten me?
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Hey!
If I remember this correctly the DigitalOcean Functions platform doesn’t automatically install from requirements.txt. You also need a build.sh script in the same folder as your __main__.py and requirements.txt.
For example, inside packages/sample/hello/ you’d have:
__main__.py
requirements.txt
build.sh
Your requirements.txt:
package-name==1.2.3...
Your build.sh:
#!/bin/bash
set -e
virtualenv --without-pip virtualenv
# For Python 3.11 runtime
pip install -r requirements.txt --target virtualenv/lib/python3.11/site-packages
Then deploy with:
doctl serverless deploy .
This way the build system creates a virtualenv and installs your deps so they’re available to your function.
Heya, @donught
Python functions with external dependencies not provided by the runtime can be deployed with a build script and a requirements.txt file.
First make sure that the file containing the handler function is named __main__.py.
Regards
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