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Never put secrets in your code

When working with APIs or databases, you’ll need:
  • API keys
  • Passwords
  • Connection strings
Putting these directly in your code is dangerous - anyone can see them!

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The solution

Environment variables let you keep secrets separate from your code. We’ll learn two approaches:

Environment variables

What they are and how they work

Using .env files

The easy way with .env files
Most Python projects use .env files - they’re simple and work great for local development.