python MySQLdb使用教程详解
本文主要内容python MySQLdb数据库批量插入insert，更新update的：
1.python MySQLdb的使用，写了一个基类让其他的sqldb继承这样比较方便，数据库的ip, port等信息使用json配置文件
2.常见的查找，批量插入更新
下面贴出基类代码：
# _*_ coding:utf-8 _*_
import MySQLdb
import json
import codecs
# 这个自己改一下啊
from utils.JsonUtil import get_json_from_file
def byteify(input):
"""
the string of json typed unicode to str in python
This function coming from stack overflow
:param input: {u'first_name': u'Guido', u'last_name': u'jack'}
:return: {'first_name': 'Guido', 'last_name': 'jack'}
"""
if isinstance(input, dict):
return {byteify(key): byteify(value)
for key, value in input.iteritems()}
elif isinstance(input, list):
return [byteify(element) for element in input]
elif isinstance(input, unicode):
return input.encode('utf-8')
else:
return input
def get_json_from_file(filename):
with open(filename) as jf:
jsondata = json.load(jf)
return byteify(jsondata)
class DbBase(object):
def __init__(self, **kwargs):
self.db_config_file = kwargs['db_config_file']
self.config_db(self.db_config_file)
def config_db(self, db_config_file):
data = get_json_from_file(db_config_file)
host = data['host']
user = data['user']
pwd = data['pwd']
db = data['db']
port = data['port']
self.tb_audit_mobile = data['tb_audit_mobile']
self.conn = MySQLdb.connect(host=host, port=port, user=user, passwd=pwd, db=db, charset="utf8", use_unicode=True)
self.cursor = self.conn.cursor()
子类的示例：
class DbAuditTestService(DbBase):
def __init__(self, **kwargs):
super(DbAuditTestService, self).__init__(**kwargs)
def getAdTestURl(self, beg, end):
sql = """select url, source from tb_name where create_date BETWEEN '%s' and '%s' """ % (beg, end)
self.cursor.execute(sql)
res = [row for row in self.cursor]
return res
def insert(self, lst_row):
"""batch insert, use ignore 避免索引唯一问题"""
try:
insert_sql = 'INSERT ignore INTO tb_ms_mobile_report_test (appid, source) VALUES (%s, %s)'
self.cursor.executemany(insert_sql, lst_row)
self.conn.commit()
except MySQLdb.OperationalError as e:
logger.info('%s' % e)
self.cursor.close()
self.conn.close()
self.config_db(self.db_config_file)
def update_ip_info(self, ip_info):
"""
batch update
[[voilate_right_rate, ip]]
:param ip_info:
:return:
"""
query = """
update tb_ms_audit_ip_info set
ip_right_rate=%s
where submit_ip=%s """
self.cursor.executemany(query, ip_info)
self.conn.commit()
def insert_all():
"""批量操作的示例"""
db_audit = DbAuditService(db_config_file='../config/mysql_police_audit.json')
size = db_audit.count()
db_audit_test = DbAuditTestService(db_config_file='../config/mysql_local_audit.json')
batch_size = 2000
for k in xrange(100000, size, batch_size):
logger.info('query limit %s ~ %s' % (k, batch_size))
lst_row = db_audit.query_limit(k, batch_size)
logger.info('convert_rows ')
lst_row = convert_rows(lst_row)
db_audit_test.insert(lst_row)
总结
以上所述是小编给大家介绍的python MySQLdb使用教程详解，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对【听图阁-专注于Python设计】网站的支持！
