作为循环的一部分将行附加到列表中

Question

我从Oracle数据库获取数据。一些数据是clob格式（第8列），所以我必须遍历每一行并进行转换。我想追加每个被转换的行以再次形成原始表。该行给我的麻烦是Complete_data = [Complete_data, fixed_data]

import cx_Oracle 
# USE THIS CONNECTION STRING FOR PRODUCTION 
production_username = '' 
production_password = '' 

con_string = '%s/%s@host' % (production_username, production_password) 
con = cx_Oracle.connect(con_string) 
cursor = con.cursor() 
querystring = ("Select * from SalesDatabase") 
cursor.execute(querystring) 
data = cursor.fetchall() 

#loop through and convert clobs to readable content 
for currentrow in data: 
    Product = currentrow[8].read() 
    fixed_data = ([currentrow[0], currentrow[1], currentrow[2], currentrow[3], currentrow[4], currentrow[5], currentrow[6], currentrow[7], Product, currentrow[9]]) 
    Complete_data = [Complete_data, fixed_data] 

con.close() 
print Complete_data 

Answer 1

来填充列表的传统方法，是创建一个空列表入手，并append项目给它一个循环中。

Complete_data = [] 
for currentrow in data: 
    Product = currentrow[8].read() 
    fixed_data = ([currentrow[0], currentrow[1], currentrow[2], currentrow[3], currentrow[4], currentrow[5], currentrow[6], currentrow[7], Product, currentrow[9]]) 
    Complete_data.append(fixed_data)