def get_table_names(conn):
    """Return a list of table names."""
    table_names = []
    tables = conn.execute("SELECT name FROM sqlite_master WHERE type='table';")
    for table in tables.fetchall():
        table_names.append(table[0])
    return table_names


def get_column_names(conn, table_name):
    """Return a list of column names."""
    column_names = []
    columns = conn.execute(f"PRAGMA table_info('{table_name}');").fetchall()
    for col in columns:
        column_names.append(col[1])
    return column_names


def get_database_info(conn):
    """Return a list of dicts containing the table name and columns for each table in the database."""
    table_dicts = []
    for table_name in get_table_names(conn):
        columns_names = get_column_names(conn, table_name)
        table_dicts.append(
            {"table_name": table_name, "column_names": columns_names})
    return table_dicts