python+sqlite3

一个小例子,

# -*- coding:utf-8 -*-
'''
Created on 2015年10月8日
(1.1)Python 2.7 Tutorial Pt 12 SQLite -
https://www.youtube.com/watch?v=Ll_ufNL5rDA
(1.2) sqlite3.connect(":memory:") 这个是亮点.
(1.3)
[Python] 74 Creating a database with SQLite 3 -
https://www.youtube.com/watch?v=n-Rtfd1Vv_M
    db.row_factory = sqlite3.Row
    在我电脑上,是否加上上面这句没什么影响.
 
(2.1)存储中文时,同样的必须加 u . 但是直接打印出来的是 \uxxxx 格式的内容
(2.2)如果不加 u ,报错如下:
sqlite3.ProgrammingError:
    You must not use 8-bit bytestrings unless you use a text_factory
    that can interpret 8-bit bytestrings (like text_factory = str).
    It is highly recommended that you instead just switch your application to Unicode strings.
'''
import sqlite3
 
# con = sqlite3.connect("sample.db")
# con = sqlite3.connect(":memory:")
 
def main():
    db = sqlite3.connect(":memory:")
    db.row_factory = sqlite3.Row
    db.execute("drop table if exists test")
    db.execute("create table test (t1 text, i1 int)")
    db.execute('insert into test (t1, i1) values(?,?)', (u'一', 1))
    db.execute('insert into test (t1, i1) values(?,?)', ('two', 2))
    db.execute('insert into test (t1, i1) values(?,?)', ('three', 3))
    db.execute('insert into test (t1, i1) values(?,?)', ('four', 4))
    db.commit()
    cursor = db.execute('select i1, t1 from test order by i1')
    for row in cursor:
        print(row)
 
    db.close()
if __name__ == "__main__": main()