How to Set Up Python Environment Variables?

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To set up Python environment variables, you need to follow these steps:

  1. Determine which environment variables you need to set. These variables typically include things like API keys, database credentials, and other sensitive information that should not be hard-coded into your Python code.
  2. Set the environment variables on your system. The method for setting environment variables varies depending on your operating system. Here are some common methods:
  • On Windows:
    • Open the Start menu and search for “Environment Variables”.
    • Click on “Edit the system environment variables”.
    • Click on the “Environment Variables” button.
    • Under “User variables” or “System variables”, click on “New”.
    • Enter the variable name and value, then click on “OK”.
  • On macOS or Linux:
    • Open a terminal window.
    • Type the following command: export VARIABLE_NAME=value
    • Replace VARIABLE_NAME with the name of the variable you want to set, and replace value with the value you want to assign to the variable.
  1. Access the environment variables in your Python code using the os module. Here’s an example:
import os

api_key = os.environ.get('API_KEY')
db_username = os.environ.get('DB_USERNAME')
db_password = os.environ.get('DB_PASSWORD')

In the above example, we use the os.environ.get() method to retrieve the values of the environment variables we set earlier. If an environment variable does not exist, the get() method returns None.

Note: Be sure to keep your environment variables secure and not share them publicly, as they may contain sensitive information that could be used to compromise your systems.

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