What would be the best way to pass a list from pyt

问题:

I am using Bottle as a web server and need to pass a python list to javascript.

When I am doing just {{myList}}, Bottle escapes single quotes for strings in the list and shows them as ' JS, in turn, isn't very happy with what it gets.

I managed to find a solution, but I don't think it's an optimal one.

var tempList = '{{eval(myList)}}'.replace(/'/g, "'");
var myNewList = eval(tempList);

I wonder, is there a better way to do this?

upd: I moved the solution I found into the 'Answers' section.

回答1:

I started using json (json_dumps in Python3, simplejson won't install), but bottle was still escaping single quotes. I found in Bottle manual that you can skip escaping using the exclamation sign and changed my code:

var myNewList = {{!myList}};

回答2:

Use the json module instead; it outputs valid JavaScript expressions after all.

JSON (JavaScript Object Notation) is a subset of JavaScript syntax (ECMA-262 3rd edition) […]

Quick example:

>>> import json
>>> json.dumps([1, 2, 'foo', 'bar'])
'[1, 2, "foo", "bar"]'

Put that straight into your template. I use this all the time to put valid JavaScript data structures into my generated web pages all the time.

回答3:

I am not familiar with Bottle, but I do have the same problem when using Django. My solution is dump the Python list to JSON format. Javascript is happy with JSON.

myList = [1, 2, 3, 'string', "&apm;", '"']

Then return simplejson.dumps(myList) to your web pages. In js:

var myList = <dumped-literal-JSON-string>

NOTE: DO NOT surround the dumpped JSON value with quotes.

回答4:

In case of django use

var myNewList = {{myList|safe}};

Django doc