CODEWITHSUNDEEP
javascriptpythonarrays
jars121
jars121

Reputation: 1147

Convert Python string to array in JavaScript

I have a JavaScript script which receives information from a Python server. The Python server outputs a list, which is converted to a string prior to being sent to the JavaScript script.

I'd like to be able to convert the received string into a form that can be indexed with JavaScript. Here's an example output string from the Python server:

var Message = [['Word1A', 'Word1B'], ['Word2A', 'Word2B'], ['Word3A', 'Word3B']];

Given the above example, I'd like to be able to query the received string as as an indexed array:

var x;
for (x in Message) {
    alert(x[0]};

The above example should return:

Word1A
Word2A
Word3A

What's the best way to go about this?

Upvotes: 1

Views: 2425

Answers (2)

Sudhansu Choudhary
Sudhansu Choudhary

Reputation: 3360

This should work,

var Message = [['Word1A', 'Word1B'], ['Word2A', 'Word2B'], ['Word3A', 'Word3B']];
var x;
for (x in Message) {
    alert(Message[x][0]);
}

Editing my answer as per you comments below which says the input would be "['Word1A', 'Word1B'], ['Word2A', 'Word2B'], ['Word3A', 'Word3B']"

Solution being,

var Message = "['Word1A', 'Word1B'], ['Word2A', 'Word2B'], ['Word3A', 'Word3B']";
var array = Message.replace(/,|[|]/g, "").split(" ");
for(var x = 0; x < array.length -1; x=x+2){
 alert(array[x].replace("[","").replace("]",""));
}

I must add, this solution will work but I'm not that fluent with regex, so more optimal solution could be achieved. Hope it helps!

Upvotes: 0

6502
6502

Reputation: 114481

You can simply use the json Python module

reply = json.dumps(Message)

to convert the array in a JSON formatted string.

Then on the client side you decode the JSON string with

message = JSON.parse(msg);

and you will get an array of 2-elements arrays

Upvotes: 2

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