Environment variable

As explained in Grokking AI Applications

An environment variable is a named configuration value supplied to a running process through its execution environment.

An environment variable is a named configuration value supplied to a running process. It lets the same application use different credentials, names, or settings without changing its flow or code. section 8.1 section 8.3

Use environment variables through a short configuration workflow:

• Create or obtain the value, such as a LangSmith API key or a project name. section 8.3
• Add the variable where the process runs: Hugging Face Space settings for deployment, or a local .env file. section 8.3
• Restart when required and preserve exported flows, because changing variables can restart a free Space and remove its current flows. section 8.3

Connecting Langflow to LangSmith

Configure LANGCHAIN_API_KEY with the generated API key and LANGCHAIN_PROJECT with a project name. Langflow then uses these values to connect with LangSmith for observability. section 8.3

Figure 8.21 Setting environment variables in a Hugging Face Space

View the configuration screen used to set environment variables in a Hugging Face Space. section 8.1 section 8.3

How Grokking AI Applications covers it

How deep it goes

Explains deployment and local configuration, examples, and restart consequences without detailing process-level environment internals.

Examples

Uses Langflow administrator credentials, a secret key, and LangSmith connection variables as configuration examples.

What it assumes

Assumes access to a Langflow installation or Hugging Face Space and credentials such as a LangSmith API key.

What you can do after

Operate/configure Langflow by setting deployment or local variables and connecting it to LangSmith.

How it connects

Connects configuration with secrets, API keys, .env files, Langflow, LangSmith, and Hugging Face Spaces.

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This explainer was generated by Manning's knowledge graph from the text of Grokking AI Applications. The section links point to the parts of the book it draws on.