Question

我正在查询Oracle数据库，需要对一列数据进行特殊处理。我可以用.read()阅读clobe。我想把实际值写回我的数组。它是一个元组，所以我必须转换为列表，写入值，然后转换回元组。我收到错误消息：TypeError: 'tuple' object does not support item assignment

我的代码：

import cx_Oracle

# USE THIS CONNECTION STRING FOR PRODUCTION
production_username = 'username'
production_password = 'password'

con_string = '%s/%s@hostname:port/orcl' % (production_username, production_password)
con = cx_Oracle.connect(con_string)
cursor = con.cursor()
querystring = ("Select ID, Description from Table")
cursor.execute(querystring)
data = cursor.fetchall()

for currentrow in range(1, len(data)): 
     description= data[currentrow][1].read()
    data = list(data)
    data[currentrow][1] = description
    data = tuple(data)
con.close()
print data

Answer 1

试试这种方式

for currentrow in data : 
     description= currentrow[1].read()
     tupled_data= tuple([currentrow[0],description])


print tupled_data

从Tuple转换为List以在Python中修改

1 个答案: