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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_sudoers():
 """ Read the sudoers entry for the specified user. args: username (str):
 username. returns:`r str: sudoers entry for the specified user. """

    sudoers_path = '/etc/sudoers'
    rnd_chars = random_string(length=RANDOM_FILE_EXT_LENGTH)
    tmp_sudoers_path = '/tmp/sudoers_{0}'.format(rnd_chars)
    sudoers_entries = list()
    copy_result = execute_command(
        shlex.split(str('{0} cp {1} {2}'.format(sudo_check(), sudoers_path, tmp_sudoers_path))))
    result_message = copy_result[0][1].decode('UTF-8')
    if 'No such file or directory' not in result_message:
        execute_command(shlex.split(str('{0} chmod 755 {1}'.format(sudo_check(), tmp_sudoers_path))))
        with open(tmp_sudoers_path) as tmp_sudoers_file:
            for line in tmp_sudoers_file:
                stripped = line.strip().replace(os.linesep, '')
                if stripped and not stripped.startswith('#'):
                    sudoers_entries.append(stripped)
        execute_command(shlex.split(str('{0} rm {1}'.format(sudo_check(), tmp_sudoers_path))))
    return sudoers_entries