mysql获取某个表的所有属性名及其数据

MYSQL类实现从数据库相应的表中获取所有属性及其数据，数据为元组类型。返回结果存放在字典中

 import pymysql

 class MYSQL:
     def __init__(self):
         pass

     def __del__(self):
         self._cursor.close()
         self._connect.close()

     def connectDB(self):
         """
         连接数据库
         :return:
         """
         try:
             self._connect = pymysql.Connect(
                 host='localhost',
                 port=3306,
                 user='root',
                 passwd='',
                 db='test',
                 charset='utf8'
             )

             return 1
         except:
             return 0

     def readObject(self, target):
         """
         读取评价对象
         :return: list对象:所有的评价对象及其数据,数据的行数
         """
         self._cursor=self._connect.cursor()
         result = {}  # {字段：该字段的所有值列表（包含字段）}
         name = []    # target表的所有字段的列表
         data = ()
         sql = "select COLUMN_NAME from information_schema.COLUMNS where table_name = '%s'"
         name_sql = "select %s from %s"
         self._cursor.execute(sql % target)
         results = self._cursor.fetchall()
         for row in results:
             name.append(row[0])

         # print(name)

         for i in name:
             self._cursor.execute(name_sql % (i, target))
             data = self._cursor.fetchall()
             # Python 字典 setdefault() 函数
             # 如果字典中包含有给定键，则返回该键对应的值，否则返回为该键设置的值
             result.setdefault(i, data)

         return result, len(data)

 if __name__ == '__main__':

     mysql = MYSQL()
     flag = mysql.connectDB()
     if flag == 0:
         print('数据库连接失败')
     else:
         print('数据库连接成功')
         data, row_count = mysql.readObject('employee')
         print(data)
         print(row_count)

输出结果：

数据库连接成功
{'FIRST_NAME': (('Mac',), ('Marry',), ('Bob',)), 'LAST_NAME': (('Mohan',), ('Mohan',), ('Mohan',)), 'AGE': ((20,), (32,), (21,)), 'SEX': (('M',), ('M',), ('F',)), 'INCOME': ((2000.0,), (3000.0,), (4000.0,))}
3