create_table = """
DROP TABLE IF EXISTS `dec_test`;
CREATE TABLE `dec_test` (
  `dec_2_2` decimal(4,2),
  `dec_4_2` decimal(6,2),
  `dec_8_4` decimal(8,4),
  `char_15` char(15)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

insert into dec_test values
(1, 1, 1, 1),
(1.1, 1.1, 1.1, 1.1),
(1.11, 1.11, 1.11, 1.11),
(1.111, 1.111, 1.111, 1.111),
(1.1111, 1.1111, 1.1111, 1.1111),
(1.11111, 1.11111, 1.11111, 1.11111),
(11.11111, 11.11111, 11.11111, 11.11111),
(NULL, 111.11111, 111.11111, 111.11111),  -- too large values cause error
(NULL, 1111.11111, 1111.11111, 1111.11111),
(NULL, NULL, NULL, 11111.11111)
;
"""

# pymysql
import pymysql

conn = pymysql.connect(host='127.0.0.1',
                       user='user',
                       password='password',
                       db='test')

cur = conn.cursor()
cur.execute('select * from dec_test')
cur.fetchall()
d1 = cur.description
cur.close()
conn.close()

# mysqldb

import MySQLdb

conn = MySQLdb.connect(host='127.0.0.1',
                       user='user',
                       passwd='password',
                       db='test')

cur = conn.cursor()
cur.execute('select * from dec_test')
cur.fetchall()
d2 = cur.description
cur.close()
conn.close()

# MySQL Connector/Python

import mysql.connector

conn = mysql.connector.connect(host='127.0.0.1',
                               user='user',
                               password='password',
                               database='test')

cur = conn.cursor()
cur.execute('select * from dec_test')
cur.fetchall()
d3 = cur.description
cur.close()
conn.close()

print d1
print d2
print d3

""" Output:
((u'dec_2_2', 246, None, 6, 6, 2, True),
 (u'dec_4_2', 246, None, 8, 8, 2, True),
 (u'dec_8_4', 246, None, 10, 10, 4, True),
 (u'char_15', 254, None, 15, 15, 0, True))

(('dec_2_2', 246, 5, 6, 6, 2, 1),
 ('dec_4_2', 246, 7, 8, 8, 2, 1),
 ('dec_8_4', 246, 9, 10, 10, 4, 1),
 ('char_15', 254, 11, 45, 45, 0, 1))

[(u'dec_2_2', 246, None, None, None, None, 1, 0),
 (u'dec_4_2', 246, None, None, None, None, 1, 0),
 (u'dec_8_4', 246, None, None, None, None, 1, 0),
 (u'char_15', 254, None, None, None, None, 1, 0)]
"""