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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 get_identifier(cmd_args, endpoint=''):
 """ Obtain anonmyzied identifier."""

    student_email = get_student_email(cmd_args, endpoint)
    if not student_email:
        return "Unknown"
    return hashlib.md5(student_email.encode()).hexdigest()