Python字典到JSON文件转换问题

Question

so i've been working on a project that scrapes a finance site and saves the top 5 fastest changing stocks in a json file for later usage. My Problem is it doesn't format it right.

Function that converts it to JSON:

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 Output:

 {
   "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"
   }
}

For some reason it puts an EOF after every entry and I can't figure out how to stop it from doing that. Thanks in advance!!

EDIT:

You probably know how its supposed to look but just in case, thats the output i want:

{
   "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

You are writing to the file once per numStock ; that is, when you write the file, stocks contains a single item, which is the current numStock .

Instead, create a stocks dictionary that contains all of your numStock items, then write that to file.