Python Excel、csvファイルをインポートoracleデータベース

# coding=utf-8
import cx_Oracle
import csv
import xlrd
import os
import datetime
class ImportOracle(object):
    def inoracle(self):
        pass
    def connOracle(self):
        os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.utf8'
        conn= cx_Oracle.connect('      ', '  ', 'IP  :   /    ')
        cursor=conn.cursor()
        fields=[i+' varchar2(200)' for i in self.title]
        fields_str=','.join(fields)
        try:
            sql='drop table %s'%(self.table_name)
            print sql
            cursor.execute(sql)
        except  cx_Oracle.Error as e:
            print e
        finally:
            sql='create table %s (%s)'%(self.table_name,fields_str)
            print sql
            cursor.execute(sql)
            a=[':%s'%i for i in range(len(self.title)+1)]
            value=','.join(a[1:])
            sql='insert into %s values(%s)'%(self.table_name,value)
            print sql
            cursor.prepare(sql)
            cursor.executemany(None, self.data)
            cursor.close()
            conn.commit()
            conn.close()
class ImportOracleCsv(ImportOracle):
    def inoracle(self):
        with open(self.filename,'rb') as f:
            reader=csv.reader(f)
        contents=[i for i in reader]

        title=contents[0]
        data=contents[1:]

        return (title,data)

class ImportOracleExcel(ImportOracle):
    def inoracle(self):
        wb=xlrd.open_workbook(self.filename)
        sheet1=wb.sheet_by_index(0)
        title=sheet1.row_values(0)
        data=[sheet1.row_values(row) for row in range(1,sheet1.nrows)]
        return (title,data)
class ImportError(ImportOracle):
    def inoracle(self):
        print 'Undefine file type'
        return 0

class ChooseFactory(object):
    choose={}
    choose['csv']=ImportOracleCsv()
    choose['xlsx']=ImportOracleExcel()
    choose['xls']=ImportOracleExcel()
    def choosefile(self,ch):
        if ch in self.choose:
            op=self.choose[ch]
        else:
            op=ImportError()
        return op
if __name__=="__main__":

    file_name=u'C:/test.xlsx'
    table_name='ly_tmp_'+datetime.datetime.now().strftime('%Y%m%d')
    op=file_name.split('.')[-1]
    factory=ChooseFactory()
    cal=factory.choosefile(op)
    cal.filename=file_name
    (cal.title,cal.data)=cal.inoracle()
    cal.table_name=table_name
    cal.connOracle()