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<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%"><div id="lc1">from django.http import HttpResponse
</div><div id="lc2">from django.utils.functional import Promise
</div><div id="lc3">from django.utils.translation import force_unicode
</div><div id="lc4">from django.utils.simplejson import JSONEncoder
</div><div id="lc5">
</div><div id="lc6">class LazyJSONEncoder(JSONEncoder):
</div><div id="lc7"> def default(self, o): 
</div><div id="lc8"> if isinstance(o, Promise):
</div><div id="lc9"> return force_unicode(o)
</div><div id="lc10"> else:
</div><div id="lc11"> return super(LazyJSONEncoder, self).default(o)
</div><div id="lc12">
</div><div id="lc13">class JsonResponse(HttpResponse):
</div><div id="lc14"> def __init__(self, data, mimetype=&#39;application/json&#39;):
</div><div id="lc15"> json_data = LazyJSONEncoder().encode(data)
</div><div id="lc16"> super(JsonResponse, self).__init__(
</div><div id="lc17"> content=json_data, mimetype=mimetype)
</div></pre></div>
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[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.http[/b][/color] [color=#008000][b]import[/b][/color] HttpResponse
[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.utils.functional[/b][/color] [color=#008000][b]import[/b][/color] Promise
[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.utils.translation[/b][/color] [color=#008000][b]import[/b][/color] force_unicode
[color=#008000][b]from[/b][/color] [color=#0000FF][b]django.utils.simplejson[/b][/color] [color=#008000][b]import[/b][/color] JSONEncoder

[color=#008000][b]class[/b][/color] [color=#0000FF][b]LazyJSONEncoder[/b][/color](JSONEncoder):
    [color=#008000][b]def[/b][/color] [color=#0000FF]default[/color]([color=#008000]self[/color], o): 
        [color=#008000][b]if[/b][/color] [color=#008000]isinstance[/color](o, Promise):
            [color=#008000][b]return[/b][/color] force_unicode(o)
        [color=#008000][b]else[/b][/color]:
            [color=#008000][b]return[/b][/color] [color=#008000]super[/color](LazyJSONEncoder, [color=#008000]self[/color])[color=#666666].[/color]default(o)

[color=#008000][b]class[/b][/color] [color=#0000FF][b]JsonResponse[/b][/color](HttpResponse):
    [color=#008000][b]def[/b][/color] [color=#0000FF]__init__[/color]([color=#008000]self[/color], data, mimetype[color=#666666]=[/color][color=#BA2121]'application/json'[/color]):
        json_data [color=#666666]=[/color] LazyJSONEncoder()[color=#666666].[/color]encode(data)
        [color=#008000]super[/color](JsonResponse, [color=#008000]self[/color])[color=#666666].[/color]__init__(
            content[color=#666666]=[/color]json_data, mimetype[color=#666666]=[/color]mimetype)

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That method generates HTML with CSS classes. Hence you'll need the style sheet file

<div class="highlight"><pre><div id="lc1">from django.http import HttpResponse
</div><div id="lc2">from django.utils.functional import Promise
</div><div id="lc3">from django.utils.translation import force_unicode
</div><div id="lc4">from django.utils.simplejson import JSONEncoder
</div><div id="lc5">
</div><div id="lc6">class LazyJSONEncoder(JSONEncoder):
</div><div id="lc7"> def default(self, o): 
</div><div id="lc8"> if isinstance(o, Promise):
</div><div id="lc9"> return force_unicode(o)
</div><div id="lc10"> else:
</div><div id="lc11"> return super(LazyJSONEncoder, self).default(o)
</div><div id="lc12">
</div><div id="lc13">class JsonResponse(HttpResponse):
</div><div id="lc14"> def __init__(self, data, mimetype=&#39;application/json&#39;):
</div><div id="lc15"> json_data = LazyJSONEncoder().encode(data)
</div><div id="lc16"> super(JsonResponse, self).__init__(
</div><div id="lc17"> content=json_data, mimetype=mimetype)
</div></pre></div>
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<blockquote><code>from&nbsp;django.http&nbsp;import&nbsp;HttpResponse
from&nbsp;django.utils.functional&nbsp;import&nbsp;Promise
from&nbsp;django.utils.translation&nbsp;import&nbsp;force_unicode
from&nbsp;django.utils.simplejson&nbsp;import&nbsp;JSONEncoder

class&nbsp;LazyJSONEncoder(JSONEncoder):
&nbsp;&nbsp;&nbsp;&nbsp;def&nbsp;default(self,&nbsp;o):&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;isinstance(o,&nbsp;Promise):
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;force_unicode(o)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else:
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;super(LazyJSONEncoder,&nbsp;self).default(o)

class&nbsp;JsonResponse(HttpResponse):
&nbsp;&nbsp;&nbsp;&nbsp;def&nbsp;__init__(self,&nbsp;data,&nbsp;mimetype=&#39;application/json&#39;):
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;json_data&nbsp;=&nbsp;LazyJSONEncoder().encode(data)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;super(JsonResponse,&nbsp;self).__init__(
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;content=json_data,&nbsp;mimetype=mimetype)
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