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Re: Brython - Python in the browser

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From Ian Kelly <ian.g.kelly@gmail.com>
Date Fri, 21 Dec 2012 16:45:03 -0700
Subject Re: Brython - Python in the browser
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On Fri, Dec 21, 2012 at 3:52 PM, Chris Angelico <rosuav@gmail.com> wrote:
> On Sat, Dec 22, 2012 at 3:36 AM, Pierre Quentel
> <pierre.quentel@gmail.com> wrote:
>>
>>> Hmm. So when that gets added into a DIV, it has to get parsed for
>>> tags? How does this work? This seems very odd. I would have expected
>>> it to remain as DOM objects.
>>
>> In DIV(child) :
>> - if child is a string, integer or float, a text node is added (addChild) to the DIV element, with the string value of child
>> - if child is another DOM element (as in DIV(B('foo'))) then this element is added to the DIV element
>
> Meaning that:
> doc <= <p></p>'
> will add literal text, not a paragraph object, right? That's
> definitely what I would expect.
>
>> doc <= 'blah blah x<y: '+B('True!')
>>
>> It will add a text node to the document, with the string 'blah blah x<y: ' followed by 'True!' in bold characters
>
> This is where it's getting confusing. My expectation of this is that
> it adds a text node with the literal text, followed by a bold node
> with its child text. This operation should never involve the parsing
> of HTML tags, as the document structure is all there in the code. So
> it ought to be a DOM object, not a text string, that gets <='d onto
> doc (is <= a verb now?). That means the result of the addition has to
> be a DOM object, not a text string; but you said that adding a string
> to a B object converts the object to a string and concatenates the
> strings.
>
> Do you see now what I mean about the API being difficult to explain?

In my playing around with it just now, the addition doesn't seem to
actually return a string.  I typed this script into the test console:

log('hello ' + B('world'))

and clicked Run, and the result was:

[object Object]

whereas if I just try to log a plain string literal, it actually
prints out the string.  Somewhat disturbingly, this also gives the
[object Object] result:

log(str('hello ' + B('world')))

In Brython, the str builtin does not return strings?

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Thread

Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-19 10:19 -0800
  Re: Brython - Python in the browser jkn <jkn_gg@nicorp.f9.co.uk> - 2012-12-19 14:59 -0800
  Re: Brython - Python in the browser Terry Reedy <tjreedy@udel.edu> - 2012-12-19 19:07 -0500
    Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-20 01:37 -0800
      Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-20 20:56 +1100
      Re: Brython - Python in the browser Terry Reedy <tjreedy@udel.edu> - 2012-12-20 18:59 -0500
        Re: Brython - Python in the browser Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-21 02:05 +0000
          Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-21 16:07 +1100
        Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 08:16 -0800
          Re: Brython - Python in the browser Stefan Behnel <stefan_ml@behnel.de> - 2012-12-21 17:52 +0100
          Re: Brython - Python in the browser Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-21 11:31 -0700
            Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 12:59 -0800
              Re: Brython - Python in the browser Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-21 14:17 -0700
            Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 12:59 -0800
        Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 08:16 -0800
      Re: Brython - Python in the browser Rouslan Korneychuk <rouslank@msn.com> - 2012-12-21 03:31 -0500
        Re: Brython - Python in the browser Terry Reedy <tjreedy@udel.edu> - 2012-12-21 04:44 -0500
    Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-20 01:37 -0800
  Re: Brython - Python in the browser Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-19 17:54 -0700
    Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-20 01:42 -0800
      Re: Brython - Python in the browser Stefan Behnel <stefan_ml@behnel.de> - 2012-12-21 12:25 +0100
        Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 04:38 -0800
          Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-21 23:57 +1100
            Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 07:36 -0800
              Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-22 02:48 +1100
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 08:36 -0800
                Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-22 09:52 +1100
                Re: Brython - Python in the browser Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-21 16:45 -0700
                Re: Brython - Python in the browser Amirouche Boubekki <amirouche.boubekki@gmail.com> - 2012-12-22 00:50 +0100
                Re: Brython - Python in the browser Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-21 16:51 -0700
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 23:59 -0800
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 23:59 -0800
                Re: Brython - Python in the browser Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-21 16:57 -0700
                Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-22 11:08 +1100
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 23:57 -0800
                Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-22 19:31 +1100
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-22 00:54 -0800
                Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-22 20:08 +1100
                Re: Brython - Python in the browser Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-22 11:05 +0000
                Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-22 23:11 +1100
                Re: Brython - Python in the browser Dan Sommers <dan@tombstonezero.net> - 2012-12-22 20:31 +0000
                Re: Brython - Python in the browser Ian Kelly <ian.g.kelly@gmail.com> - 2012-12-22 13:53 -0700
                Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-23 08:49 +1100
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-22 00:54 -0800
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 23:57 -0800
                Re: Brython - Python in the browser Chris Angelico <rosuav@gmail.com> - 2012-12-22 11:09 +1100
                Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 08:36 -0800
            Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 07:36 -0800
          Re: Brython - Python in the browser Duncan Booth <duncan.booth@invalid.invalid> - 2012-12-21 13:14 +0000
            Re: Brython - Python in the browser Stefan Behnel <stefan_ml@behnel.de> - 2012-12-21 14:34 +0100
        Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-21 04:38 -0800
        Re: Brython - Python in the browser Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-22 02:31 +0000
    Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-20 01:42 -0800
  Re: Brython - Python in the browser Terry Reedy <tjreedy@udel.edu> - 2012-12-19 21:46 -0500
  Re: Brython - Python in the browser Jamie Paul Griffin <jamie@kode5.net> - 2012-12-20 11:32 +0000
  Re: Brython - Python in the browser Pierre Quentel <pierre.quentel@gmail.com> - 2012-12-22 01:01 -0800

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