Hi Kees,
console.log(@{{isArray}}(tmp)); results in true **** now is true ****
console.log(@{{isObject}}(tmp)); results in true
console.log(tmp[0]); results in [1,2,3,4]
but i am now getting this error when doing jsObjectToPyObject...
TypeError: '<1,2,3,4>' is not iterable Traceback: pyjslib.py, line 466
pyjamas.DOM.py, line 561:
Is there any other info you may need ? or some kind of live example ?
On Fri, Jun 28, 2013 at 8:53 AM, Kees Bos <[email protected]> wrote:
> Ok. The Array 'class' is changed in pyjslib. So, Array and $wnd.Array
> differ.
>
> Change isArray in pyjslib and see what happens. Change is to:
>
> def isArray(a):
> JS("""
> return @{{isObject}}(@{{a}}) && (@{{a}}['constructor'] === Array ||
> @{{a}}['constructor'] === $wnd['Array']);
> """)
>
>
>
> On Fri, Jun 28, 2013 at 8:54 AM, Kees Bos <[email protected]> wrote:
>
>> On Tue, 2013-06-25 at 10:09 +0100, Apexi 200sx wrote:
>> > Hi,
>> >
>> >
>> > might be one for Kees or C Anthony
>> >
>> >
>> >
>> > I want to use the msgpack (serialization format) JS library from
>> > pyjs/pyjamas
>> >
>> >
>> > I am tried to use builtin conversion routines
>> >
>> >
>> > """my_msgpack module"""
>> >
>> > from __pyjamas__ import JS
>> > from pyjslib import toJSObjects, isArray, isObject
>> > import json
>> >
>> > parser = json.JSONParser()
>> > js_to_py = getattr(parser, 'jsObjectToPyObject')
>> >
>> >
>> > def pack(obj):
>> > js_obj = toJSObjects(obj)
>> > print js_obj
>>
>> What you get here, is an array. Try this:
>> is_array = JS("(js_obj instanceof Array? true : false)")
>> print "pack js_obj instanceof Array:", is_array
>>
>>
>> > JS("""
>> > return $wnd.msgpack.pack(@{{js_obj}});
>> > """)
>> >
>> > def unpack_to_js(packed_js):
>> > JS("""
>> > tmp = $wnd.msgpack.unpack(@{{packed_js}});
>> > console.log(@{{isArray}}(tmp));
>> > console.log(@{{isObject}}(tmp));
>> > console.log(tmp[0]);
>> > return tmp;
>> > """)
>> >
>> > def unpack(packed):
>> > js_obj = unpack_to_js(packed)
>>
>> What you get here, looks like an array, but isn't. Try this:
>> is_array = JS("(js_obj instanceof Array? true : false)")
>> print "pack js_obj instanceof Array:", is_array
>>
>> > print js_obj
>> > py_obj = js_to_py(js_obj)
>> > return py_obj
>>
>>
>> My guess is that something weird happening in msgpack.unpack. The js
>> object to be packed is an instance of Array, while the unpacked js
>> object is not an instance of Array.
>>
>>
>> > then from another module i do...
>> >
>> >
>> > list_dat = [[1,2,3,4], ["a","b","c","d"]]
>> >
>> >
>> > packed = my_msgpack.pack(list_dat)
>> >
>> > my_msgpack.unpack(packed)
>> >
>> >
>> > results in...
>> >
>> > {'0': {'0': 1, '1': 2, '2': 3, '3': 4}, '1': {'0': 'a', '1': 'b', '2':
>> > 'c', '3': 'd'}}
>> >
>> >
>> > from the above unpack_to_js function...
>> >
>> > console.log(@{{isArray}}(tmp)); results in false
>> > console.log(@{{isObject}}(tmp)); results in true
>> > console.log(tmp[0]); results in [1,2,3,4]
>> >
>> >
>> > so it seems toJSObjects is constructing the correct javascript
>> > objects/types and msgpack is able to convert to/from msgpack format
>> > fine but I cannot turn the resulting JS into the correct python types.
>> >
>> >
>> > Note also that I have tried...
>> > js_to_py = getattr(parser, 'jsObjectToPyObject')
>> > and
>> > js_to_py = getattr(parser, 'jsObjectToPy')
>> >
>> >
>> >
>> >
>> > attached is the msgpack.js lib
>> >
>> > --
>> >
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>> >
>> >
>>
>>
>>
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