Python字典到JSON文件转换问题

Question

所以我一直在研究一个项目，该项目抓取金融网站并将前 5 名变化最快的股票保存在 json 文件中以供以后使用。 我的问题是它的格式不正确。

将其转换为 JSON 的函数：

def writeToJSON(num, short, name, price, change):
stocks = {}
numStock = {
    "Short" : short,
    "Name" : name,
    "Price" : price,
    "Change" : change
    }


stocks.update({str(num) : numStock,})
with open(".\\sstocksim\\stocks.json", "a") as f:
    json.dump(stocks, f, indent=3)
    f.close()

JSON 输出：

 {
   "1": {
      "Short": "AXSM",
      "Name": "Axsome Therapeutics, Inc.",
      "Price": "81.64",
      "Change": "+34.85"
   }
}{
   "2": {
      "Short": "TSLA",
      "Name": "Tesla, Inc.",
      "Price": "381.44",
      "Change": "+23.05"
   }
}{
   "3": {
      "Short": "CGX.TO",
      "Name": "Cineplex Inc.",
      "Price": "33.83",
      "Change": "+9.82"
   }
}{
   "4": {
      "Short": "MIRM",
      "Name": "Mirum Pharmaceuticals, Inc.",
      "Price": "17.17",
      "Change": "+8.98"
   }
}{
   "5": {
      "Short": "AMGN",
      "Name": "Amgen Inc.",
      "Price": "244.51",
      "Change": "+7.77"
   }
}

出于某种原因，它在每次输入后都会放置一个 EOF，我不知道如何阻止它这样做。 提前致谢！！

编辑：

您可能知道它应该是什么样子，但以防万一，这就是我想要的输出：

{
   "1": {
      "Short": "AXSM",
      "Name": "Axsome Therapeutics, Inc.",
      "Price": "81.64",
      "Change": "+34.85"
   },

   "2": {
      "Short": "TSLA",
      "Name": "Tesla, Inc.",
      "Price": "381.44",
      "Change": "+23.05"
   },

   "3": {
      "Short": "CGX.TO",
      "Name": "Cineplex Inc.",
      "Price": "33.83",
      "Change": "+9.82"
   },

   "4": {
      "Short": "MIRM",
      "Name": "Mirum Pharmaceuticals, Inc.",
      "Price": "17.17",
      "Change": "+8.98"
   },

   "5": {
      "Short": "AMGN",
      "Name": "Amgen Inc.",
      "Price": "244.51",
      "Change": "+7.77"
   }
}

Answer 1

您每个numStock写入一次文件； 也就是说，当您写入文件时， stocks包含一个项目，即当前的numStock 。

相反，创建一个包含所有numStock项目的stocks字典，然后将其写入文件。