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Step 1: Create a Basic Python Web Server

First, you’ll need a simple Python web server. Flask is a lightweight WSGI web application framework that’s perfect for this purpose.

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Step 1: Creating a Simple Python “Hello World” Application

  1. Set Up Your Python Environment:
    • Ensure Python is installed on your system. You can download it from python.org.
    • Optionally, create a virtual environment for your project to manage dependencies:
    python -m venv venv
source venv/bin/activate  # On Windows use `venv\Scripts\activate`
  2. Create a New Python File:
    • In your project directory, create a file named app.py.
  3. Write a Simple Python Program:
    • Open app.py in your favorite text editor or IDE and write a simple Python program:
    print("Hello, World!")
  4. Run Your Program:
    • Run your program from the command line or terminal:
    python app.py
    • You should see “Hello, World!” printed to the console.

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Step 2: Integrate Statsig for A/B Testing

  1. Install Statsig SDK:
    • Add the Statsig SDK to your project:
    pip install statsig
  2. Initialize Statsig in Your Application:
    • Modify app.py to include initialization of the Statsig SDK and to check a feature flag. You will need a server secret key from Statsig, which you can get from the Statsig dashboard.
    from statsig import statsig
from statsig.statsig_user import StatsigUser
# Initialize Statsig with your server secret key
statsig.initialize('your_server_secret_key')
user = StatsigUser(
  user_id = "user123",
  email = "test@statsig.com",
)  # Customize user info as needed
experiment = statsig.get_experiment(user, 'your_experiment_name')
text_to_show = experiment.get('text', 'Hello, World!')
print(text_to_show)
# Shutdown Statsig before your application exits
statsig.shutdown()
    • Replace 'your_server_secret_key' with your actual server secret key from Statsig.
    • Replace 'your_experiment_name' with the name of your experiment.

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Step 3: Creating the A/B Test in Statsig Console

  1. Log Into Statsig Console:
    • Access the Statsig Console and sign in.
  2. Create an Experiment:
    • Navigate to the “Experiments” section and click “Create New”.
    • Fill in the experiment details, including a unique key for 'your_experiment_name'.
  3. Configure Experiment Variants:
    • Define your variants, for example, variant_a and variant_b.
    • Add a parameter called 'text' for each variant and configure the text you wish to display, such as “This is Control Variant” and “This is Test Variant”.
  4. Launch Your Experiment:
    • After setting up your variants and their parameters, save your configurations and start the experiment.
By following these steps, you’ve set up a Python Flask application that utilizes Statsig for running an A/B test, dynamically serving different text content based on the experiment’s variant. This setup enables data-driven decisions and iterative improvements based on user interactions.