如何在python中读取sqlite并解码运行长度编码格式？

我正在读取运行长度编码格式的sqlite文件

code.py

import sqlite3
conn = sqlite3.connect("data.sqlite3")

#print(conn)     it prints object but decode function works on array instead of object also i don't have table name.
c = conn.cursor()
conn.close()

---

我如何解码其中的数据？

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#!/usr/bin/python
import sqlite3
from sqlite3 import Error


def create_connection(db_file):
""" create a database connection to the SQLite database
    specified by the db_file
:param db_file: database file
:return: Connection object or None
"""
try:
    conn = sqlite3.connect(db_file)
    return conn
except Error as e:
    print(e)

return None


def select_all_tasks(conn):
"""
Query all rows in the tasks table
:param conn: the Connection object
:return:
"""
cur = conn.cursor()
cur.execute("SELECT * FROM tasks")

rows = cur.fetchall()

for row in rows:
    print(row)


def select_task_by_priority(conn, priority):
"""
Query tasks by priority
:param conn: the Connection object
:param priority:
:return:
"""
cur = conn.cursor()
cur.execute("SELECT * FROM tasks WHERE priority=?", (priority,))

rows = cur.fetchall()

for row in rows:
    print(row)


def main():
database = "C:\\sqlite\db\pythonsqlite.db"

# create a database connection
conn = create_connection(database)
with conn:
    print("1. Query task by priority:")
    select_task_by_priority(conn,1)

    print("2. Query all tasks")
    select_all_tasks(conn)


if __name__ == '__main__':
main()