1.导入Python SQLITE数据库模块 Python2.5之后,内置了SQLite3,成为了内置模块,这给我们省了安装的功夫,只需导入即可~ import sqlite3 2. 创建/打开数据库 在调用connect函数的时候,指定库名称,如果指定的数据库存在就直接打开这个数据库,如果不存在就新创建一个再打开。 cx = sqlite3.connect("E:/test.db") ...
importsqlite3# 连接数据库conn=sqlite3.connect('dictionary.db')cursor=conn.cursor()# 创建表cursor.execute('CREATE TABLE IF NOT EXISTS dictionary (key TEXT, value TEXT)')# 插入数据definsert_into_db(key,value):cursor.execute('INSERT INTO dictionary (key, value) VALUES (?, ?)', 1. 2. 3...
'create table if not exists dictionary(id integer PRIMARY KEY autoincrement, word varchar(40), ismyword varchar(1))') i = 0 for word in one_artical_words: cursor.execute('select word from dictionary where word=?', [word]) if cursor.fetchall() == []: cursor.execute('insert into di...
异常处理try…except 更新和修改和删除都应该检查表数据是否存在...python 操作数据库插入语句占位符问题 1,在 Python 中使用 sqlite3 连接数据库,插入语句的展位符为 “?”...,(1,name,12)) 2、在 Python 中,使用 pymysql 连接 mysql 数据库,插入语句的占位符为 “%s” cursor.execute(“insert into ...
1、自动化office，包括对excel、word、ppt、email、pdf等常用办公场景的操作，python都有对应的工具库，...
What if you could insert a Python dictionary into the database? DictORM allows you to select/insert/update/delete rows of a database as if they were Python Dictionaries.InstallationInstall dictorm using pip, with the default sqlite backend:pip install dictorm...
分享50个最有价值的图表【python实现代码】。 目录 准备工作分享51个常用图表在Python中的实现,按使用场景分7大类图,目录如下:一、关联(Correlation)关系图 1、散点图(Scatter plot) 2、边界气泡图(Bubble plot with Encircling) 3、散点图添加趋势线(Scatter plot with linear regression line of best fit) 4、...
insert into tanzhou value(2,'name'); ()中的字段名可写可不写,默认按顺序添加 insert into student value(3) 也可只插入id insert into tanzhou set id=4,name='name1'; 增的第二个语法 查 select * from student; 查看student select * from student where id<4; 查看student 并且id小于4的内容 ...
Data:JSON, Pickle, CSV,SQLite, Bytes, Struct, Array, Memory_View, Deque. Advanced:Threading, Operator, Introspection, Metaprograming, Eval, Coroutines. 线程,操作符,自省,元编程,Eval,协程。 Libraries:Progress_Bar, Plot, Table, Curses, Logging, Scraping, Web, Profile,NumPy, Image, Audio, Games...
conn = sqlite3.connect("test.db") c = conn.cursor() books = [(1, 1, 'Cook Recipe', 3.12, 1), (2, 3, 'Python Intro', 17.5, 2), (3, 2, 'OS Intro', 13.6, 2), ] # execute "INSERT" c.execute("INSERT INTO category VALUES (1, 1, 'kitchen')") # using the placeholder...