You should pass the file contents (i.e. a string) to json.loads(), not the file object itself. Try this: with open(file_path) as f: data = json.loads(f.read()) print(data[0][‘text’]) There’s also the json.load() function which accepts a file object and does the f.read() part for you under the hood.
You can use the standard FileReaderSync, which is a simpler, synchronous, blocking version of the FileReader API, similar to what you are already using: let reader = new FileReaderSync(); let result_base64 = reader.readAsDataURL(file); console.log(result_base64); // aGV5IHRoZXJl… Keep in mind though that this is only available in worker threads, for obvious reasons. If you need a … Read more
First, You should understand “streaming” in Java because all “Readers” in Java are built upon this concept. File Streaming File streaming is carried out by the FileInputStream object in Java. // it reads a byte at a time and stores into the ‘byt’ variable int byt; while((byt = fileInputStream.read()) != -1) { fileOutputStream.write(byt); } This … Read more
(Following is a late but complete answer) FileReader methods support FileReader.readAsBinaryString() is deprecated. Don’t use it! It’s no longer in the W3C File API working draft: void abort(); void readAsArrayBuffer(Blob blob); void readAsText(Blob blob, optional DOMString encoding); void readAsDataURL(Blob blob); NB: Note that File is a kind of extended Blob structure. Mozilla still implements readAsBinaryString() … Read more
The basic setup of decorators is like this: InputStream fileStream = new FileInputStream(filename); InputStream gzipStream = new GZIPInputStream(fileStream); Reader decoder = new InputStreamReader(gzipStream, encoding); BufferedReader buffered = new BufferedReader(decoder); The key issue in this snippet is the value of encoding. This is the character encoding of the text in the file. Is it “US-ASCII”, “UTF-8”, … Read more
An InputStream is the raw method of getting information from a resource. It grabs the data byte by byte without performing any kind of translation. If you are reading image data, or any binary file, this is the stream to use. A Reader is designed for character streams. If the information you are reading is … Read more
PrintWriter gives more methods (println), but the most important (and worrying) difference to be aware of is that it swallows exceptions. You can call checkError later on to see whether any errors have occurred, but typically you’d use PrintWriter for things like writing to the console – or in “quick ‘n dirty” apps where you … Read more
Below Function converts the Excel sheet (XLSX format) data to JSON. you can add promise to the function. <script src=”https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/jszip.js”></script> <script src=”https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/xlsx.js”></script> <script> var ExcelToJSON = function() { this.parseExcel = function(file) { var reader = new FileReader(); reader.onload = function(e) { var data = e.target.result; var workbook = XLSX.read(data, { type: ‘binary’ }); workbook.SheetNames.forEach(function(sheetName) { … Read more
no. BufferedReader.close() closes the stream according to javadoc for BufferedReader and InputStreamReader as well as FileReader.close() does.