@Marvin Can I use an environment variable in the folder from a pull_from_s3 step in the prefect.yaml file ?

Yes, you can use environment variables in the

prefect.yaml

file. Environment variables are useful for configuring settings or the runtime environment of a workflow. They take precedence over other sources, making them ideal for adjustments that should only apply to a single session or process. To use an environment variable in your

prefect.yaml

, you can reference it using the syntax

${ENV_VAR_NAME}

. This allows you to dynamically set values, such as the folder path for the

pull_from_s3

step, based on your environment configuration. For more details, you can refer to the Prefect documentation on settings and profiles and infrastructure concepts.

@Marvin I tried printing the environment variables via env in my linux box but the variable did not show up

If the environment variable isn't showing up when you print the environment variables on your Linux box, it might not be set correctly in the shell session. Here are a few steps you can take to troubleshoot and ensure the variable is set: 1. Check if the Variable is Set: Ensure that the environment variable is set in the current shell session. You can do this by running:

bash
   echo $YOUR_ENV_VAR

Replace

YOUR_ENV_VAR

with the name of your variable. 2. Set the Environment Variable: If the variable isn't set, you can set it temporarily for the session using:

bash
   export YOUR_ENV_VAR=value

This will make it available until you close the shell session. 3. Permanent Environment Variables: For a more permanent solution, add the export command to your shell's configuration file (e.g.,

.bashrc

,

.bash_profile

, or

.zshrc

):

bash
   echo 'export YOUR_ENV_VAR=value' >> ~/.bashrc

Then, reload the configuration:

bash
   source ~/.bashrc

4. Check for Typos: Ensure there are no typos in the variable name when you set it and when you reference it. 5. Environment File: If you're using a

.env

file, make sure Prefect is running in a directory that contains the

.env

file. Prefect will automatically apply settings from this file. After following these steps, try printing the environment variables again to verify that your variable is set.