Instructions for sending an array of integers as an argument from JavaScript to Python

Question

Instructions for sending an array of integers as an argument from JavaScript to Python

I have a JavaScript function that extracts the values of multiple checkboxes and stores them in an array:

var selectedValues = $('.item:checked').map(function(){return parseInt($(this).attr('name'));}).get();

My goal is to pass this array from JavaScript to a Python function as a parameter. Currently, I am achieving this using AJAX and jQuery:

$.ajax({
    url : "{{tg.url('/foo/bar')}}",
    data : {
            selectedValues: JSON.stringify(selectedValues),
        ...
    },

In my Python code, I'm retrieving these parameters like this:

parsedValues = get_paramw(kw, 'selectedValues', int)

This method works, but the array is received as a string with unnecessary symbols such as "[", "]", ",", and """. This requires additional parsing, which isn't the most efficient way to handle this situation.

What would be the proper way to receive an array of integers from JavaScript as an actual array of integers in Python (not as a string)?

javascript jquery python ajax

Answer 1

Answer №1

When it comes to transferring simple structured data from Javascript to Python, the most efficient method is using JSON. The Javascript part is already set up with JSON.stringify(my_list). All that's left is incorporating the Python side of things, which can be done with just a single line of code:

item_list_json = get_paramw(kw, 'my_list', unicode)
item_list = json.loads(item_list_json)

If your JS array, item_list, consisted of numbers like [1, 2, 3, 4], the corresponding list in your Python script would look like this: [1, 2, 3, 4].

(Don't forget to add import json at the beginning of your script, so technically it's a two-line process.)

Answer 2

When it comes to transferring simple structured data from Javascript to Python, the most efficient method is using JSON. The Javascript part is already set up with JSON.stringify(my_list). All that's left is incorporating the Python side of things, which can be done with just a single line of code:

item_list_json = get_paramw(kw, 'my_list', unicode)
item_list = json.loads(item_list_json)

If your JS array, item_list, consisted of numbers like [1, 2, 3, 4], the corresponding list in your Python script would look like this: [1, 2, 3, 4].

(Don't forget to add import json at the beginning of your script, so technically it's a two-line process.)

Answer 3

Answer №2

The correct method for sending multiple values for a single key is demonstrated below:

data: {
    my_values: my_values,
},
traditional: true
...

Assuming my_values = [ 4, 5, 6 ], this will generate the following query string / POST data:

my_values=4&my_values=5&my_values=6

If the traditional flag is not set, the result would be:

my_values[]=4&my_values[]=5&my_values[]=6

This approach still functions, but when using TurboGears, it is necessary to access it as my_values[].

Moreover, I am uncertain about whether TG's keyword argument passing supports multiple values. If you receive a single value in kw, utilize request.getall('bar') to retrieve all the keys named bar as a list (potentially an empty list).

Answer 4

The correct method for sending multiple values for a single key is demonstrated below:

data: {
    my_values: my_values,
},
traditional: true
...

Assuming my_values = [ 4, 5, 6 ], this will generate the following query string / POST data:

my_values=4&my_values=5&my_values=6

If the traditional flag is not set, the result would be:

my_values[]=4&my_values[]=5&my_values[]=6

This approach still functions, but when using TurboGears, it is necessary to access it as my_values[].

Moreover, I am uncertain about whether TG's keyword argument passing supports multiple values. If you receive a single value in kw, utilize request.getall('bar') to retrieve all the keys named bar as a list (potentially an empty list).

Instructions for sending an array of integers as an argument from JavaScript to Python

Answer №1

Answer №2

Similar questions

Issues with utilizing jQuery AJAX for form submissions

Unleash the power of AJAX to dynamically load additional content on

Is it possible for me to send transactions asynchronously using polkadot-js?

The Jquery change event binding does not function properly when dealing with dynamically generated content

What factors should be considered when deciding whether to create an entity in Django using Tastypie, based on data from another entity?

The efficiency of WebMethod decreases

The server is unable to process your request to /graphql

The height of the browser action will not return to its original state

Swapping JSON: A Quick Guide

Creating a realistic typewriter effect by incorporating Code Block as the input

Is there a way to automate the process of exporting WhatsApp messages?

Using Double Equal in a JavaScript For Loop

The form continues to submit even if the validation process fails

What is the process for adjusting the expiration time of a GitLab accessToken?

Adding a fresh element and removing the initial item from a collection of Objects in JavaScript

Kivy displays a blank screen every time it runs

Attempting to utilize jQuery for altering the background URL leads to the unexpected removal of the -webkit-background-clip:text; effect

No need for jQuery with this scrolling image gallery

How to implement a self-invoking function in React JS like you would in regular JavaScript?

Try to refrain from invoking effect within a component that is being conditionally rendered