Python data manipulation methods encapsulate class instances

This article gives an example of the Python data manipulation method wrapper class. To share for your reference, specific as follows:

Data insertion, single data insertion and batch data insertion are often used in work. The following is a class enclosed by me, which I recommend to you:

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:Eric.yue
import logging
import MySQLdb
class _MySQL(object):
  def __init__(self,host, port, user, passwd, db):
    self.conn = MySQLdb.connect(
      host = host,
      port = port,
      user = user,
      passwd = passwd,
      db = db,
      charset='utf8'
    )
  def get_cursor(self):
    return self.conn.cursor()
  def query(self, sql):
    cursor = self.get_cursor()
    try:
      cursor.execute(sql, None)
      result = cursor.fetchall()
    except Exception, e:
      logging.error("mysql query error: %s", e)
      return None
    finally:
      cursor.close()
    return result
  def execute(self, sql, param=None):
    cursor = self.get_cursor()
    try:
      cursor.execute(sql, param)
      self.conn.commit()
      affected_row = cursor.rowcount
    except Exception, e:
      logging.error("mysql execute error: %s", e)
      return 0
    finally:
      cursor.close()
    return affected_row
  def executemany(self, sql, params=None):
    cursor = self.get_cursor()
    try:
      cursor.executemany(sql, params)
      self.conn.commit()
      affected_rows = cursor.rowcount
    except Exception, e:
      logging.error("mysql executemany error: %s", e)
      return 0
    finally:
      cursor.close()
    return affected_rows
  def close(self):
    try:
      self.conn.close()
    except:
      pass
  def __del__(self):
    self.close()
mysql = _MySQL('127.0.0.1', 3306, 'root', '123456', 'test')
def create_table():
  table = """
      CREATE TABLE IF NOT EXISTS `watchdog`(
        `id` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
        `name` varchar(100),
        `price` int(11) NOT NULL DEFAULT 0
      ) ENGINE=InnoDB charset=utf8;
      """
  print mysql.execute(table)
def insert_data():
  params = [('dog_%d' % i, i) for i in xrange(12)]
  sql = "INSERT INTO `watchdog`(`name`,`price`) VALUES(%s,%s);"
  print mysql.executemany(sql, params)
if __name__ == '__main__':
  create_table()
  insert_data()

More about Python related content interested readers to view this site project: "common database operations Python skills summary", "Python coding skills summary", "Python data structure and algorithm tutorial", "Python Socket programming skills summary", "Python function using techniques", "Python string skills summary", "Python introduction and advanced tutorial" and "Python file and directory skills summary"

I hope this article has been helpful for Python programming.