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Embedding plotly graph on djgano template

i have been trying to embed plotly onto my dgango template but i am unable to get it done, tied many times but i can’t get it done file
class Preprocess():
    df = pd.read_csv('F:\lcdata.csv')
    df_sample = df.head()
    table = FF.create_table(df_sample)
    global table
    global df_sample
    def import_display(self):
        return df_sample
        #return iplot(table, filename='pandas_table')
    def draw_chart(self):
        plotly_url = plot(table, filename='pandas_table')
        pie_url = '<iframe width="200" height="200" frameborder="0" seamless="seamless" scrolling="yes" src='+plotly_url+'.embed?width=200&height=200&link=false&showlegend=false></iframe>'
        return pie_url

this is my file

    def display_table(request):
        return render(request, 'ml/index.html', { 'preprocess':preprocess})

this is my template index.html

{% block title %}
<h2>Latest reviews</h2>
{% endblock %}

{% block content %}
<div class="row">
    <div class="col-xs-6 col-lg-4">
        <h4> {{ preprocess.import_display }}</h4>
            <div style="width:600;height:500">
        {{ preprocess.draw_chart }}
{% endblock %}