字典是另一种可变容器模型,且可存储任意类型对象,主要是工具类,
接下来使用pymysql来创建表与SQL
下面来看看示例代码:
import pymysql
class UseMysql(object):
def __init__(self, user, passwd, db, host="127.0.0.1", port=3306):
self.db = db
self.conn = pymysql.connect(
host=host, user=user, passwd=passwd, db=db, port=port, charset='utf8') # 链接数据库
self.cursor = self.conn.cursor()
def table_exists(self, table_name) -> bool:
"""判断表是否存在
:param table_name: 表名
:return: 存在返回True,不存在返回False
"""
sql = "show tables;"
self.cursor.execute(sql)
tables = self.cursor.fetchall()
for _t in tables:
if table_name == _t[0]:
return True
return False
def create_table(self, data: dict, table_name):
"""创建表"""
# 构造数据库
sql_key_str = ''
columnStyle = ' text' # 数据库字段类型
for key in data.keys():
sql_key_str = sql_key_str + ' ' + key + columnStyle + ','
self.cursor.execute("CREATE TABLE %s (%s)" % (table_name, sql_key_str[:-1]))
# 添加自增ID
self.cursor.execute("""ALTER TABLE `{}` \
ADD COLUMN `id` INT NOT NULL AUTO_INCREMENT FIRST, \
ADD PRIMARY KEY (`id`);"""
.format(table_name))
# 添加创建时间
self.cursor.execute(
"""ALTER TABLE {} ADD join_time timestamp NULL DEFAULT current_timestamp();""".format(table_name))
def write_dict(self, data: dict, table_name):
"""
写入mysql,如果没有表,创建表
:param data: 字典类型
:param table_name: 表名
:return:
"""
if not self.table_exists(table_name):
self.create_table(data, table_name)
sql_key = '' # 数据库行字段
sql_value = '' # 数据库值
for key in data.keys(): # 生成insert插入语句
sql_value = (sql_value + '"' + pymysql.escape_string(data[key]) + '"' + ',')
sql_key = sql_key + ' ' + key + ','
self.cursor.execute(
"INSERT INTO %s (%s) VALUES (%s)" % (table_name, sql_key[:-1], sql_value[:-1]))
self.conn.commit() # 提交当前事务
if __name__ == '__main__':
mysql = UseMysql('用户名', '密码', '数据库名')
my_data1 = {"col1": "a", "col2": "b", "col3": "c", }
mysql.write_dict(my_data1, table_name="mytable")
my_data2 = {"col1": "a2", "col2": "b2"}
mysql.write_dict(my_data2, table_name="mytable")
到此这篇关于Python保存dict字典类型数据到Mysql并自动创建表与列的文章就介绍到这了,更多相关Python保存dict字典类型数据到Mysql并自动创建表与列内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!