initial_var_validation.py

# Function
def initial_var_validation():
  # Get env variable GITHUB_TOKEN, and if not present, exit
  if 'GITHUB_TOKEN' not in os.environ:
    print("GITHUB_TOKEN not found in environment variables")
    exit(1)
  # Read repo we should evluate as an environmental var
  if 'GITHUB_ORG' not in os.environ:
    print("GITHUB_ORG not found in environment variables")
    exit(1)
  return True

# Calling it
if initial_var_validation() == True:
  GITHUB_ORG = os.environ['GITHUB_ORG']
  GITHUB_TOKEN = os.environ['GITHUB_TOKEN']