Python字典json

Question

我正在使用 dict 创建一个 json 对象，但我在使用 dict 和 json 时遇到了一些问题!

def get(self):

    players = db.GqlQuery("SELECT * FROM Player")

    playerInfo  = {}



    for player in players:
        email = player.email.encode("utf-8")
        gem =  str(player.gem)

        print email
        print gem

        playerInfo["email"] = email
        playerInfo["gem"] = gem


    b = json.dumps(playerInfo)

    self.response.out.write(b)

出于某种原因，我只收到一个和 for 循环，当我在 for 循环中打印电子邮件时，我收到了 6 个结果，但 playerInfo 的输出只有一组数据。

{"email": "test1", "gem": "0"}

我的预期结果应该是

{"email": "test1", "gem": "0"},{"email": "test2", "gem": "2"}...

Answer 1

你想要的，我想是一个字典列表。这将使您能够存储多个实体:

players = db.GqlQuery("SELECT * FROM Player")

playerInfo  = []

for player in players:
    email = player.email.encode("utf-8")
    gem =  str(player.gem)

    playerInfo.append({"email" :email, "gem": gem})

b = json.dumps(playerInfo)

self.response.out.write(b)

此外，您确实希望避免在您的 AppEngine 应用程序中使用 print。请改用日志记录，因为 print 可能会产生意想不到的副作用。