将字典的键名提取到列表| python中|

我有一个json数据,如下所示

json数据

data = '''
{
 "p1":[ {"Name":"A","Age":45} , 
             {"Name":"B","Age":26} ],
 "p2":[ {"Name":"C","Age":25} , 
             {"Name":"D","Age":26} ]
}
'''

我的代码:

import json

jdata = json.loads(data)
jkey  = jdata.keys()   # (['p1','p2']) 
jheader = []
for row in jkey:
    jheader.append(jdata[row][0])
    break;

如何仅将标题放入标题列表

预期产出:

header = ['Name','Age']