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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 init():
    '''
    Get an sqlite3 connection, and initialize the package database if necessary
    '''
    if not os.path.exists(__opts__['spm_cache_dir']):
        log.debug('Creating SPM cache directory at %s', __opts__['spm_db'])
        os.makedirs(__opts__['spm_cache_dir'])

    if not os.path.exists(__opts__['spm_db']):
        log.debug('Creating new package database at %s', __opts__['spm_db'])

    sqlite3.enable_callback_tracebacks(True)
    conn = sqlite3.connect(__opts__['spm_db'], isolation_level=None)

    try:
        conn.execute('SELECT count(*) FROM packages')
    except OperationalError:
        conn.execute('''CREATE TABLE packages (
            package text,
            version text,
            release text,
            installed text,
            os text,
            os_family text,
            dependencies text,
            os_dependencies text,
            os_family_dependencies text,
            summary text,
            description text
        )''')

    try:
        conn.execute('SELECT count(*) FROM files')
    except OperationalError:
        conn.execute('''CREATE TABLE files (
            package text,
            path text,
            size real,
            mode text,
            sum text,
            major text,
            minor text,
            linkname text,
            linkpath text,
            uname text,
            gname text,
            mtime text
        )''')

    return conn