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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read_profile_from_environment_variables():
 """ Read profiles from env :return: """

    role_arn = os.environ.get('AWS_ROLE_ARN', None)
    external_id = os.environ.get('AWS_EXTERNAL_ID', None)
    return role_arn, external_id