python开发_python操作mysql数据库

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我做了一个demo：

先看运行效果：

mysql中情况：

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代码部分：

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 # -*- coding: utf-8 -*-
 #python operate mysql database
 import MySQLdb

 #数据库名称
 DATABASE_NAME = ''
 #host = 'localhost' or '172.0.0.1'
 HOST = ''
 #端口号
 PORT = ''
 #用户名称
 USER_NAME = ''
 #数据库密码
 PASSWORD = ''
 #数据库编码
 CHAR_SET = ''

 #初始化参数
 def init():
     global DATABASE_NAME
     DATABASE_NAME = 'test'
     global HOST
     HOST = 'localhost'
     global PORT
     PORT = ''
     global USER_NAME
     USER_NAME = 'root'
     global PASSWORD
     PASSWORD = 'root'
     global CHAR_SET
     CHAR_SET = 'utf8'

 #获取数据库连接
 def get_conn():
     init()
     return MySQLdb.connect(host = HOST, user = USER_NAME, passwd = PASSWORD, db = DATABASE_NAME, charset = CHAR_SET)

 #获取cursor
 def get_cursor(conn):
     return conn.cursor()

 #关闭连接
 def conn_close(conn):
     if conn != None:
         conn.close()

 #关闭cursor
 def cursor_close(cursor):
     if cursor != None:
         cursor.close()

 #关闭所有
 def close(cursor, conn):
     cursor_close(cursor)
     conn_close(conn)

 #创建表
 def create_table():
     sql = '''
     CREATE TABLE `student` (
     `id` int(11) NOT NULL,
     `name` varchar(20) NOT NULL,
     `age` int(11) DEFAULT NULL,
     PRIMARY KEY (`id`),
     UNIQUE KEY `name` (`name`)
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8
     '''
     conn = get_conn()
     cursor = get_cursor(conn)
     result = cursor.execute(sql)
     conn.commit()
     close(cursor, conn)
     return result

 #查询表信息
 def query_table(table_name):
     if table_name != '':
         sql = 'select * from ' + table_name
         conn = get_conn()
         cursor = get_cursor(conn)
         result = cursor.execute(sql)
         for row in cursor.fetchall():
             print(row)
             #for r in row:      #循环每一条数据
                 #print(r)
         close(cursor, conn)
     else:
         print('table name is empty!')

 #插入数据
 def insert_table():
     sql = 'insert into student(id, name, age) values(%s, %s, %s)'
     params = ('', 'Hongten_a', '')
     conn = get_conn()
     cursor = get_cursor(conn)
     result = cursor.execute(sql, params)
     conn.commit()
     close(cursor, conn)
     return result

 #更新数据
 def update_table():
     sql = 'update student set name = %s where id = 1'
     params = ('HONGTEN')
     conn = get_conn()
     cursor = get_cursor(conn)
     result = cursor.execute(sql, params)
     conn.commit()
     close(cursor, conn)
     return result

 #删除数据
 def delete_data():
     sql = 'delete from student where id = %s'
     params = ('')
     conn = get_conn()
     cursor = get_cursor(conn)
     result = cursor.execute(sql, params)
     conn.commit()
     close(cursor, conn)
     return result

 #数据库连接信息
 def print_info():
     print('数据库连接信息:' + DATABASE_NAME + HOST + PORT + USER_NAME + PASSWORD + CHAR_SET)

 #打印出数据库中表情况
 def show_databases():
     sql = 'show databases'
     conn = get_conn()
     cursor = get_cursor(conn)
     result = cursor.execute(sql)
     for row in cursor.fetchall():
         print(row)

 #数据库中表情况
 def show_tables():
     sql = 'show tables'
     conn = get_conn()
     cursor = get_cursor(conn)
     result = cursor.execute(sql)
     for row in cursor.fetchall():
         print(row)

 def main():
     show_tables()
     #创建表
     result = create_table()
     print(result)
     #查询表
     query_table('student')
     #插入数据
     print(insert_table())
     print('插入数据后....')
     query_table('student')
     #更新数据
     print(update_table())
     print('更新数据后....')
     query_table('student')
     #删除数据
     delete_data()
     print('删除数据后....')
     query_table('student')
     print_info()
     #数据库中表情况
     show_tables()

 if __name__ == '__main__':
     main()

你还可以参考：

http://drizzlewalk.blog.51cto.com/2203401/448874