python3.6使用mysql

因为MySQLdb不支持python3,需要导入pymysql

可以选择pip 安装pymysql，或者pycharm安装

[File] >> [settings] >> [Project: python] >> [Project Interpreter] >> "+"

import pymysql.cursors

# 连接数据库

connect = pymysql.Connect(

    host='localhost',

    port=3310,

    user='root',

    passwd='root',

    db='python',

    charset='utf8'

)

# 获取游标

cursor = connect.cursor()

# 插入数据

sql = "INSERT INTO trade (name, account, saving) VALUES ( '%s', '%s', %.2f )"

data = ('雷军', '', 10000)

cursor.execute(sql % data)

connect.commit()

print('成功插入', cursor.rowcount, '条数据')

# 修改数据

sql = "UPDATE trade SET saving = %.2f WHERE account = '%s' "

data = (8888, '')

cursor.execute(sql % data)

connect.commit()

print('成功修改', cursor.rowcount, '条数据')

# 查询数据

sql = "SELECT name,saving FROM trade WHERE account = '%s' "

data = ('',)

cursor.execute(sql % data)

for row in cursor.fetchall():

    print("Name:%s\tSaving:%.2f" % row)

print('共查找出', cursor.rowcount, '条数据')

# 删除数据

sql = "DELETE FROM trade WHERE account = '%s' LIMIT %d"

data = ('', 1)

cursor.execute(sql % data)

connect.commit()

print('成功删除', cursor.rowcount, '条数据')

# 事务处理

sql_1 = "UPDATE trade SET saving = saving + 1000 WHERE account = '18012345678' "

sql_2 = "UPDATE trade SET expend = expend + 1000 WHERE account = '18012345678' "

sql_3 = "UPDATE trade SET income = income + 2000 WHERE account = '18012345678' "

try:

    cursor.execute(sql_1)  # 储蓄增加1000

    cursor.execute(sql_2)  # 支出增加1000

    cursor.execute(sql_3)  # 收入增加2000

except Exception as e:

    connect.rollback()  # 事务回滚

    print('事务处理失败', e)

else:

    connect.commit()  # 事务提交

    print('事务处理成功', cursor.rowcount)

# 关闭连接

cursor.close()

connect.close()

def insert_data(news_list):

    try:

        connect = get_connect()

        cursor = connect.cursor()

        for news in news_list:

            sql = "INSERT INTO news(title, tag, source, source_url, keyword, keywords) VALUES ( %s,%s,%s,%s,%s,%s)"

            #data = {news.title, news.tag, news.source, news.source_url, news.keyword, news.keywords}

            cursor.execute(sql, (news.title, news.tag, news.source, news.source_url, news.keyword, news.keywords))

        connect.commit()

    except Exception as e:

        print(e)

    finally:

        cursor.close()

        connect.close()

def select_url():

    arrList = []

    try:

        connect = get_connect()

        cursor = connect.cursor()

        print("connection")

        sql = "SELECT id,source_url FROM news"

        cursor.execute(sql)

        result = cursor.fetchall()

        for row in result:

            # print(row[])

            news = News()

            news.source_url = row[]

            arrList.append(news)

    except Exception as e:

        print(e)

    finally:

        return arrList