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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 load_data_subject_areas(subject_file):
 """ reads the subject file to a list, to confirm config is setup """

    lst = []
    if os.path.exists(subject_file):
        with open(subject_file, 'r') as f:
            for line in f:
                lst.append(line.strip())
    else:
        print('MISSING DATA FILE (subject_file) ' , subject_file)
        print('update your config.py or config.txt')
    return lst