刪除 jsonl 文件末尾的所有 EOF（多余的空行）

Question

我正在使用在 VSCode 編輯器中看起來像這樣的 jsonl 文件：

第一個.jsonl

1.{"ConnectionTime": 730669.644775033,"objectId": "eHFvTUNqTR","CustomName": "Relay Controller","FirmwareRevision": "FW V1.96","DeviceID": "F1E4746E-DCEC-495B-AC75-1DFD66527561","PeripheralType": 9,"updatedAt": "2016-12-13T15:50:41.626Z","Model": "DF Bluno","HardwareRevision": "HW V1.7","Serial": "0123456789","createdAt": "2016-12-13T15:50:41.626Z","Manufacturer": "DFRobot"}
2.{"ConnectionTime": 702937.7616419792, "objectId": "uYuT3zgyez", "CustomName": "Relay Controller", "FirmwareRevision": "FW V1.96", "DeviceID": "F1E4746E-DCEC-495B-AC75-1DFD66527561", "PeripheralType": 9, "updatedAt": "2016-12-13T08:08:29.829Z", "Model": "DF Bluno", "HardwareRevision": "HW V1.7", "Serial": "0123456789", "createdAt": "2016-12-13T08:08:29.829Z", "Manufacturer": "DFRobot"}
3.
4.
5.
6.

第二個.jsonl

1.{"ConnectionTime": 730669.644775033,"objectId": "eHFvTUNqTR","CustomName": "Relay Controller","FirmwareRevision": "FW V1.96","DeviceID": "F1E4746E-DCEC-495B-AC75-1DFD66527561","PeripheralType": 9,"updatedAt": "2016-12-13T15:50:41.626Z","Model": "DF Bluno","HardwareRevision": "HW V1.7","Serial": "0123456789","createdAt": "2016-12-13T15:50:41.626Z","Manufacturer": "DFRobot"}
2.{"ConnectionTime": 702937.7616419792, "objectId": "uYuT3zgyez", "CustomName": "Relay Controller", "FirmwareRevision": "FW V1.96", "DeviceID": "F1E4746E-DCEC-495B-AC75-1DFD66527561", "PeripheralType": 9, "updatedAt": "2016-12-13T08:08:29.829Z", "Model": "DF Bluno", "HardwareRevision": "HW V1.7", "Serial": "0123456789", "createdAt": "2016-12-13T08:08:29.829Z", "Manufacturer": "DFRobot"}
3.
4.

然后還有更多，具有隨機數量的結束線/ EOF 標記。 我想在每個文件的末尾有單行或空行。 我不斷收到此錯誤raise JSONDecodeError("Expecting value", s, err.value) from Nonejson.decoder.JSONDecodeError: Expecting value: line 2 column 1 (char 1) using this method：

filenames = glob.glob("folder_with_all_jsonl/*.jsonl")

#read file by file, write file by file. Simple.

for f in filenames:
#path to the jsonl file/s 
    data_json = io.open(f, mode='r', encoding='utf-8-sig') # Opens in the JSONL file
    data_python = extract_json(data_json)
#.....code omitted
    for line in data_python: # it would fail here because of an empty line
        print(line.get(objectId))
        #and so on

我手動刪除了一些額外的行，並且能夠處理我的 2 個 jsonl 文件。

我看過這些 SO 板：
1> 使用 Python 刪除 json 文件中的新換行符。

2> 讀取文件時用單個換行符替換多個換行符

請給我提示/幫助。 我會很感激的！！

我希望每個文件都采用這種格式：first.jsonl

1.{"ConnectionTime": 730669.644775033,"objectId": "eHFvTUNqTR","CustomName": "Relay Controller","FirmwareRevision": "FW V1.96","DeviceID": "F1E4746E-DCEC-495B-AC75-1DFD66527561","PeripheralType": 9,"updatedAt": "2016-12-13T15:50:41.626Z","Model": "DF Bluno","HardwareRevision": "HW V1.7","Serial": "0123456789","createdAt": "2016-12-13T15:50:41.626Z","Manufacturer": "DFRobot"}
2.{"ConnectionTime": 702937.7616419792, "objectId": "uYuT3zgyez", "CustomName": "Relay Controller", "FirmwareRevision": "FW V1.96", "DeviceID": "F1E4746E-DCEC-495B-AC75-1DFD66527561", "PeripheralType": 9, "updatedAt": "2016-12-13T08:08:29.829Z", "Model": "DF Bluno", "HardwareRevision": "HW V1.7", "Serial": "0123456789", "createdAt": "2016-12-13T08:08:29.829Z", "Manufacturer": "DFRobot"}

編輯：我使用了正陽宋的回答和 chepner 的建議我實際上有兩個 4gb 文件，這樣做：

results = []
for f in glob.glob("folder_with_all_jsonl/*.jsonl"):
    with open(f, 'r', encoding='utf-8-sig') as infile:
        for line in infile:
            try:
                results.append(json.loads(line)) # read each line of the file
            except ValueError:
                print(f)
    with open(f,'w', encoding= 'utf-8-sig') as outfile:
        for result in results:
            outfile.write(json.dumps(result) + "\n")

導致錯誤line 852, in start _start_new_thread(self._bootstrap, ()) RuntimeError: can't start new thread我在我的個人 windows 機器上。

編輯 2：我遷移到我的工作機器，我能夠解決這個問題。 任何輸入我們如何在個人機器上防止這種情況？ 像並行處理？？

Answer 1

只是為了響應您的最后一個代碼段。

你可以換行

json.dump(result, outfile, indent=None)

類似於：

for one_item in result:
    outfile.write(json.dumps(one_item)+"\n")