从零学Python，python-Day02.rar

#!/usr/bin/python3 # -*- coding:utf-8 -*- import pymysql import os import configparser from pymysql.cursors import DictCursor from DBUtils.PooledDB import PooledDB class Config(object): """ # Config().get_content("user_information") 配置文件里面的参数 [dbMysql] host = 192.168.1.180 port = 3306 user = root password = 123456 """ def __init__(self, config_filename="dbMysqlConfig.cnf"): file_path = os.path.join(os.path.dirname(__file__), config_filename) self.cf = configparser.ConfigParser() self.cf.read(file_path) def get_sections(self): return self.cf.sections() def get_options(self, section): return self.cf.options(section) def get_content(self, section): result = {} for option in self.get_options(section): value = self.cf.get(section, option) result[option] = int(value) if value.isdigit() else value return result class BasePymysqlPool(object): def __init__(self, host, port, user, password, db_name): self.db_host = host self.db_port = int(port) self.user = user self.password = str(password) self.db = db_name self.conn = None self.cursor = None class MyPymysqlPool(BasePymysqlPool): """ MYSQL数据库对象，负责产生数据库连接 , 此类中的连接采用连接池实现 获取连接对象：conn = Mysql.getConn() 释放连接对象;conn.close()或del conn """ # 连接池对象 __pool = None def __init__(self, conf_name=None): self.conf = Config().get_content(conf_name) super(MyPymysqlPool, self).__init__(**self.conf) # 数据库构造函数，从连接池中取出连接，并生成操作游标 self._conn = self.__getConn() self._cursor = self._conn.cursor() def __getConn(self): """ @summary: 静态方法，从连接池中取出连接 @return MySQLdb.connection """ if MyPymysqlPool.__pool is None: __pool = PooledDB(creator=pymysql, mincached=1, maxcached=20, host=self.db_host, port=self.db_port, user=self.user, passwd=self.password, db=self.db, use_unicode=True, charset="utf8", cursorclass=DictCursor) print("12211212") return __pool.connection() def getAll(self, sql, param=None): """ @summary: 执行查询，并取出所有结果集 @param sql:查询ＳＱＬ，如果有查询条件，请只指定条件列表，并将条件值使用参数[param]传递进来 @param param: 可选参数，条件列表值（元组/列表） @return: result list(字典对象)/boolean 查询到的结果集 """ if param is None: count = self._cursor.execute(sql) else: count = self._cursor.execute(sql, param) if count > 0: result = self._cursor.fetchall() else: result = False return result def getOne(self, sql, param=None): """ @summary: 执行查询，并取出第一条 @param sql:查询ＳＱＬ，如果有查询条件，请只指定条件列表，并将条件值使用参数[param]传递进来 @param param: 可选参数，条件列表值（元组/列表） @return: result list/boolean 查询到的结果集 """ if param is None: count = self._cursor.execute(sql) else: count = self._cursor.execute(sql, param) if count > 0: result = self._cursor.fetchone() else: result = False return result def getMany(self, sql, num, param=None): """ @summary: 执行查询，并取出num条结果 @param sql:查询ＳＱＬ，如果有查询条件，请只指定条件列表，并将条件值使用参数[param]传递进来 @param num:取得的结果条数 @param param: 可选参数，条件列表值（元组/列表） @return: result list/boolean 查询到的结果集 """ if param is None: count = self._cursor.execute(sql) else: count = self._cursor.execute(sql, param) if count > 0: result = self._cursor.fetchmany(num) else: result = False return result def insertMany(self, sql, values): """ @summary: 向数据表插入多条记录 @param sql:要插入的ＳＱＬ格式 @param values:要插入的记录数据tuple(tuple)/list[list] @return: count 受影响的行数 """ count = self._cursor.executemany(sql, values) return count def __query(self, sql, param=None): if param is None: count = self._cursor.execute(sql) else: count = self._cursor.execute(sql, param) return count def update(self, sql, param=None): """ @summary: 更新数据表记录 @param sql: ＳＱＬ格式及条件，使用(%s,%s) @param param: 要更新的 值 tuple/list @return: count 受影响的行数 """ return self.__query(sql, param) def insert(self, sql, param=None): """ @summary: 更新数据表记录 @param sql: ＳＱＬ格式及条件，使用(%s,%s) @param param: 要更新的 值 tuple/list @return: count 受影响的行数 """ return self.__query(sql, param) def delete(self, sql, param=None): """ @summary: 删除数据表记录 @param sql: ＳＱＬ格式及条件，使用(%s,%s) @param param: 要删除的条件 值 tuple/list @return: count 受影响的行数 """ return self.__query(sql, param) def begin(self): """ @summary: 开启事务 """ self._conn.autocommit(0) def end(self, option='commit'): """ @summary: 结束事务 """ if option == 'commit': self._conn.commit() else: self._conn.rollback() def dispose(self, isEnd=1): """ @summary: 释放连接池资源 """ if isEnd == 1: self.end('commit') else: self.end('rollback') self._cursor.close() self._conn.close() if __name__ == '__main__': mysql = MyPymysqlPool("dbMysql") sqlAll = "select * from seckill;" result = mysql.getAll(sqlAll) print(result) # 释放资源 mysql.dispose()