Your credentials stored at .env are required to run transactions on Hedera testnet.
- dotenv has load_dotenv() to load credentails
- os has getenv() to read the credentials
We use both, for example:
# Import dotenv and os
from dotenv import load_dotenv
from os import getenv
# Load variables from .env into environment
load_dotenv()
# Read the variables
operator_id_string = getenv("OPERATOR_ID")
operator_key_string = getenv("OPERATOR_KEY")
# Printing confirming loading and reading
print(f"Congratulations! We loaded your operator ID: {operator_id_string}.")
print("Your operator key was loaded successfully (not printed for security).")