CSV Sqlite Python脚本绑定数量不正确

Question

我正在尝试用一个Python脚本往我的sqlite表里插入数据。

之前一切都运行得很好，直到我想添加一个叫做'information'的新列，这时出现了以下错误：

You must not use 8-bit bytestrings unless you use a text_factory that can interpret 8-bit bytestrings

于是我添加了：

conn.text_factory = str

然后我又遇到了这个错误：

Incorrect number of bindings supplied. The current statement uses 7, and there are 3 supplied.

我觉得问题可能出在这个新的'information'列上，因为它包含了几行文本，所以我可能把它的类型指定错了，写成了'text'。我的Python脚本代码是：

import sqlite3;
from datetime import datetime, date;
import time
conn = sqlite3.connect('mynewtable.sqlite3')
conn.text_factory = str
c = conn.cursor()
c.execute('drop table if exists mynewtable')
c.execute('create table mynewtable(id integer primary key autoincrement, rank integer, placename text, information text, nooftimes integer, visit text, fav integer, year integer)')

def mysplit (string):
quote = False
retval = []
current = ""
for char in string:
    if char == '"':
        quote = not quote
    elif char == ',' and not quote:
        retval.append(current)
        current = ""
    else:
        current += char
retval.append(current)
return retval

# Read lines from file, skipping first line
data = open("mynewtable.csv", "r").readlines()[1:]
for entry in data:
# Parse values
vals = mysplit(entry.strip())

# Insert the row!
print "Inserting %s..." % (vals[0])
sql = "insert into mynewtable values(NULL, ?, ?, ?, ?, ?, ?, ?)"
c.execute(sql, vals)

# Done!
conn.commit()

Answer 1

看起来你有点想要重新发明轮子呢 :)

试试用Python的csv模块吧；我用过很多次，效果非常好：http://docs.python.org/library/csv.html

它能很好地处理格式正确的csv文件，尤其是那些包含多行文本的文件。

补充：

比如，你可以直接在你的执行函数中使用csv的行（这些行是列表）：

import csv
for row in csv.reader(open('allnamesallyearsn.csv')):
    c.execute(sql, row)

第二次补充：

根据我之前的评论，这里是你发布的代码，使用了csv模块：

import sqlite3, csv, time
from datetime import datetime, date

conn = sqlite3.connect('mynewtable.sqlite3')
conn.text_factory = str
c = conn.cursor()
c.execute('drop table if exists mynewtable')
c.execute('create table mynewtable('
          'id integer primary key autoincrement, '
          'rank integer, '
          'placename text, '
          'information text, '
          'nooftimes integer, '
          'visit text, '
          'fav integer, '
          'year integer)')

sql_insert = "insert into mynewtable values(NULL, ?, ?, ?, ?, ?, ?, ?)"
csv_reader = csv.reader(open('mynewtable.csv', 'rb'))
csv_reader.next() # skip headers
for csv_row in csv_reader:
    print "Inserting %s..." % (csv_row)
    c.execute(sql_insert, csv_row)

conn.commit()