从 mysql 数据库查询结果到列表

Question

最终我想将主机输出到列表中。

try:
  cnx = mysql.connector.connect(user='root', password='passwd', 
database='some_db')
  cursor = cnx.cursor()
except mysql.connector.Error as err:
  print("Something went wrong: {}".format(err))

retrieveQuery = ("SELECT host_name,product from server")
cursor.execute(retrieveQuery)
for host,prod in cursor:
print ("{},{}".format(host,prod))

结果看起来不错：[host1,PowerEdge]

retrieveQuery = ("SELECT host_name from server")
cursor.execute(retrieveQuery)
for host in cursor:
print ("{}".format(host))

结果：(u'host1',)

为什么我看到 (u',) 具有相同的代码，但只选择了一列？非常感谢任何帮助

Answer 1

您的 cursor 行结果始终是 tuple 类型，尝试：

for row in cursor:
    print ("{}".format(row.host_name))

或

for host, in cursor:
    print ("{}".format(host))

从 mysql 数据库查询结果到列表

Querying results from mysql DB to a list

python

mysql-python