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python 3.6 +pyMysql 操作mysql數據庫(實例講解)

2020-02-16 11:13:13
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版本信息:python:3.6  mysql:5.7  pyMysql:0.7.11

################################################################# #author: 陳月白 #_blogs: http://www.cnblogs.com/chenyuebai/ ################################################################# # -*- coding: utf-8 -*-class MysqlTools(): """ 連接mysql 庫、表操作 """ def __init__(self,host,dbname,user,passwd,charset="utf8"): self.host = host self.dbname = dbname self.user = user self.passwd = passwd self.charset = charset def connectMysqlDatabase(self): """連接db""" try:  #連接db  connect = pymysql.connect(host=self.host,user=self.user,passwd=self.passwd,db=self.dbname,charset=self.charset)  cursor = connect.cursor()  databaseConnectInfo = self.user + "@" + "self.host" + "/" + self.dbname  print("INFO:connect database %s success."%databaseConnectInfo)  return connect,cursor except:  traceback.print_exc()  print("ERROR:FUNCTION connectMysqlDatabase connect mysql database failed.") def executeSqlLine(self,sqlLine): """執行單條sql語句""" if sqlLine and isinstance(sqlLine,str):  print("INFO:now start connect mysql dababase.")  connect,cursor = self.connectMysqlDatabase()  executeResult = ""  try:  #游標執行sql  cursor.execute(sqlLine)  executeResult = cursor.fetchall() #獲取所有執行結果  cursor.close()    #關閉游標  connect.commit()   #確認提交  print("INFO:execute sql sucess. sqlLine = ", sqlLine)  except Exception as e:  print("ERROR:execute sql failed.errorInfo =",e)  print("ERROR:FUNCTION executeSql execute failed.sqlLine =",sqlLine)  connect.rollback()   #回滾db  return str(e) + " sqlLine = " + sqlLine  #斷開連接  connect.close()  print("INFO:connect closed./n")  return executeResult else:  print("ERROR:param sqlLine is empty or type is not str.sqlLine = ",sqlLine) def executeBatchSql(self,sqlList): """ 批量執行sql exp: executeBatchSql([sql_1,    sql_2,    sql_3,    ......    ]) """ finalResultList = [] if sqlList:  for sql in sqlList:  executeResult = self.executeSqlLine(sql)  finalResultList.append(executeResult) else:  print("ERROR:param sqlList is empty.") return finalResultList

測試代碼:

# -*- coding: utf-8 -*-from my_code.work_tools import WorkToolsmysql = WorkTools.MysqlTools("localhost","testdbname","rootuername","passwd")#執行單行sqlret1 = mysql.executeSqlLine("show databases")#批量執行ret2 = mysql.executeBatchSql([       "show databases",       "show tables",       "update students_info set name = '王大花D' where id = 2",       "select * from students_info",       "error sql test"  #異常sql測試        ])print("ret1 = ",ret1)print("---------------------")for i in ret2: print(i)

測試表:

執行結果:

ret1 = (('information_schema',), ('mysql',), ('performance_schema',), ('sakila',), ('sys',), ('testdb',), ('world',))---------------------(('information_schema',), ('mysql',), ('performance_schema',), ('sakila',), ('sys',), ('testdb',), ('world',))(('students_info',),)()((1, '陳月白', 'male', 25, '20176666', '1351234'), (2, '王大花D', 'female', 19, '19920816', '10086'), (3, '李強新', 'male', 18, '19941025', '10000'), (4, '王鵬', 'male', 20, '19970405', '10010'), (5, '鐘齊', 'male', 22, '19970420', '123456789'), (6, '王大花', 'female', 15, '19981024', '12345678'))(1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'error sql test' at line 1") sqlLine = error sql test            
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