How to use the litecli.packages.parseutils.extract_tables function in litecli

if prev_tok and prev_tok.value and prev_tok.value.lower() == "using":
            # tbl1 INNER JOIN tbl2 USING (col1, col2)
            tables = extract_tables(full_text)

            # suggest columns that are present in more than one table
            return [{"type": "column", "tables": tables, "drop_unique": True}]
        elif p.token_first().value.lower() == "select":
            # If the lparen is preceeded by a space chances are we're about to
            # do a sub-select.
            if last_word(text_before_cursor, "all_punctuations").startswith("("):
                return [{"type": "keyword"}]
        elif p.token_first().value.lower() == "show":
            return [{"type": "show"}]

        # We're probably in a function argument list
        return [{"type": "column", "tables": extract_tables(full_text)}]
    elif token_v in ("set", "by", "distinct"):
        return [{"type": "column", "tables": extract_tables(full_text)}]
    elif token_v == "as":
        # Don't suggest anything for an alias
        return []
    elif token_v in ("show"):
        return [{"type": "show"}]
    elif token_v in ("to",):
        p = sqlparse.parse(text_before_cursor)[0]
        if p.token_first().value.lower() == "change":
            return [{"type": "change"}]
        else:
            return [{"type": "user"}]
    elif token_v in ("user", "for"):
        return [{"type": "user"}]
    elif token_v in ("select", "where", "having"):

# Only tables can be TRUNCATED, otherwise suggest views
        if token_v != "truncate":
            suggest.append({"type": "view", "schema": schema})

        return suggest

    elif token_v in ("table", "view", "function"):
        # E.g. 'DROP FUNCTION ', 'ALTER TABLE '
        rel_type = token_v
        schema = (identifier and identifier.get_parent_name()) or []
        if schema:
            return [{"type": rel_type, "schema": schema}]
        else:
            return [{"type": "schema"}, {"type": rel_type, "schema": []}]
    elif token_v == "on":
        tables = extract_tables(full_text)  # [(schema, table, alias), ...]
        parent = (identifier and identifier.get_parent_name()) or []
        if parent:
            # "ON parent."
            # parent can be either a schema name or table alias
            tables = [t for t in tables if identifies(parent, *t)]
            return [
                {"type": "column", "tables": tables},
                {"type": "table", "schema": parent},
                {"type": "view", "schema": parent},
                {"type": "function", "schema": parent},
            ]
        else:
            # ON 
            # Use table alias if there is one, otherwise the table name
            aliases = [alias or table for (schema, table, alias) in tables]
            suggest = [{"type": "alias", "aliases": aliases}]

return []
    elif token_v in ("show"):
        return [{"type": "show"}]
    elif token_v in ("to",):
        p = sqlparse.parse(text_before_cursor)[0]
        if p.token_first().value.lower() == "change":
            return [{"type": "change"}]
        else:
            return [{"type": "user"}]
    elif token_v in ("user", "for"):
        return [{"type": "user"}]
    elif token_v in ("select", "where", "having"):
        # Check for a table alias or schema qualification
        parent = (identifier and identifier.get_parent_name()) or []

        tables = extract_tables(full_text)
        if parent:
            tables = [t for t in tables if identifies(parent, *t)]
            return [
                {"type": "column", "tables": tables},
                {"type": "table", "schema": parent},
                {"type": "view", "schema": parent},
                {"type": "function", "schema": parent},
            ]
        else:
            aliases = [alias or table for (schema, table, alias) in tables]
            return [
                {"type": "column", "tables": tables},
                {"type": "function", "schema": []},
                {"type": "alias", "aliases": aliases},
                {"type": "keyword"},
            ]

if isinstance(prev_tok, Comparison):
                # e.g. "SELECT foo FROM bar WHERE foo = ANY("
                prev_tok = prev_tok.tokens[-1]

            prev_tok = prev_tok.value.lower()
            if prev_tok == "exists":
                return [{"type": "keyword"}]
            else:
                return column_suggestions

        # Get the token before the parens
        idx, prev_tok = p.token_prev(len(p.tokens) - 1)
        if prev_tok and prev_tok.value and prev_tok.value.lower() == "using":
            # tbl1 INNER JOIN tbl2 USING (col1, col2)
            tables = extract_tables(full_text)

            # suggest columns that are present in more than one table
            return [{"type": "column", "tables": tables, "drop_unique": True}]
        elif p.token_first().value.lower() == "select":
            # If the lparen is preceeded by a space chances are we're about to
            # do a sub-select.
            if last_word(text_before_cursor, "all_punctuations").startswith("("):
                return [{"type": "keyword"}]
        elif p.token_first().value.lower() == "show":
            return [{"type": "show"}]

        # We're probably in a function argument list
        return [{"type": "column", "tables": extract_tables(full_text)}]
    elif token_v in ("set", "by", "distinct"):
        return [{"type": "column", "tables": extract_tables(full_text)}]
    elif token_v == "as":

def adapter(data, headers, table_format=None, **kwargs):
    tables = extract_tables(formatter.query)
    if len(tables) > 0:
        table = tables[0]
        if table[0]:
            table_name = "{}.{}".format(*table[:2])
        else:
            table_name = table[1]
    else:
        table_name = "`DUAL`"
    escape = formatter.litecli.sqlexecute.conn.escape
    if table_format == "sql-insert":
        h = "`, `".join(headers)
        yield "INSERT INTO {} (`{}`) VALUES".format(table_name, h)
        prefix = "  "
        for d in data:
            values = ", ".join(escape(v) for i, v in enumerate(d))
            yield "{}({})".format(prefix, values)