I am trying to parse the result of my python call with JSON.parse . I provide here only the result of my python script (the dictionary).
python script
import json
mydict = {
"brand": "Ford",
"model": "Mustang",
"licensePlate" : "O XXX YYY",
"year" : 1964,
"insured": {
'lastname' : 'Snow',
'firstname' : 'John',
'adress' : 'Holiday street, 4 - Paradise'
}
}
myjsonlist = json.dumps(mydict, indent = 4)
print(myjsonlist)
my javascript calls the python script and tries to parse the result(= the dictionary from python). The goal is to be able to use this dictionary in javascript. In other words, I would like to extract in javascript the brand of the car like brandCar = resut.brand .
//Import express.js module and create its variable.
const express=require('express');
const app=express();
//Import PythonShell module.
const {PythonShell} =require('python-shell');
//Router to handle the incoming request.
//Here are the option object in which arguments can be passed for the python_test.js.
let options = {
mode: 'text',
pythonOptions: ['-u'], // get print results in real-time
scriptPath: '/mnt/c/Users/xxxxx/javascript/' //If you are having python script in same folder, then it's optional.
//args: ['xxxx'] //An argument which can be accessed in the script using sys.argv[1]
};
PythonShell.run('pythonscript.py', options, function (err, result){
if (err) throw err;
// result is an array consisting of messages collected
//during execution of script.
console.log('result: ', result.toString());
console.log(JSON.parse(result[0]));
});
In the console, i have this as error message and result
result: {, "brand": "Ford",, "model": "Mustang",, "licensePlate": "O XXX YYY",, "year": 1964,, "insured": {, "lastname": "Snow",, "firstname": "John",, "adress": "Holiday street, 4 - Paradise", },}
undefined:1
{
SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at /mnt/c/Users/xxxxx/javascript/test2.js:62:19
at PythonShell._endCallback (/mnt/c/Users/xxxxx/javascript/node_modules/python-shell/index.js:254:20)
at terminateIfNeeded (/mnt/c/Users/xxxxx/javascript/node_modules/python-shell/index.js:209:39)
at ChildProcess.<anonymous> (/mnt/c/Users/xxxxx/javascript/node_modules/python-shell/index.js:182:13)
at ChildProcess.emit (events.js:400:28)
at Process.ChildProcess._handle.onexit (internal/child_process.js:282:12)
can you help me with this? I work with Ubuntu Bash for Windows 10, I don't know if this information is relevant or not...
I finally resolved my issue by
1) in the python script, I print the dictionary without converting it into a json object. When python is called in javascript it returns a string like below
result: {'brand': 'Ford', 'model': 'Mustang', 'licensePlate': 'O XXX YYY', 'year': 1964, 'insured': {'lastname': 'Snow', 'firstname': 'John', 'adress': 'Holiday street, 4 - Paradise'}}
this string contains single quotes.
2) In javascript, I replace all single quotes with double quotes for parsing this string to a json object.
let parsedData = JSON.parse(JSON.stringify(result.join('\n')));
parsedData = parsedData.replace(/'/g, `"`); // replace the quote by the double quotes for parsing the string to a JSON object.
parsedData = JSON.parse(parsedData);