filter lines starting with SHOW and SELECT from a sql file

grep_modifying_sql.py

import sys


def main():
    try:
        sql_file = sys.argv[1]
        with open(sql_file, 'r') as f:
            lines = f.readlines()
            filtered_lines = filter(lambda l:
                                    not l.startswith('/*')
                                    and not l.startswith('SHOW')
                                    and not l.startswith('SELECT')
                                    , lines)
            for line in filtered_lines:
                print(line)
    except IndexError:
        print('file argument is required.')


if __name__ == '__main__':
    main()