data=[]

trace_names=['Subscriber', 'Customer']

for i in range(2):
    data.append(
        go.Histogram(
            x=trip[(trip.subscription_type==trace_names[i]) & (trip.duration_min<60)].duration_min,
            name=trace_names[i],
            marker=dict(
                color=chosen_colors[i]
            ),
            opacity=0.5
        )
    )

layout = go.Layout(
    title='Distribution of bike trip duration in Bay Area',
    barmode='overlay',
    xaxis=dict(
        title='Trip Duration (minutes)'
    ),
    yaxis=dict(
        title='Count'
    ),
    #hovermode='closest',
    #showlegend=True
)

figure = go.Figure(data=data, layout=layout)

ply.iplot(figure)