bar plot end point

barplot.py

@app.route('/bar.img')
def bar(): 
    query       = request.args.get('q')
    username    = request.args.get('username')
    api_key     = request.args.get('apikey')

    xlabel      = request.args.get('xlabel')
    ylabel      = request.args.get('ylabel')
    title       = request.args.get('title')

    data = carto_query(query,username,api_key)
    fig = Figure()
    ax = fig.add_subplot(111)
    data.set_index('cat').plot(kind='barh',ax=ax)
    ax.set_title(title)
    ax.set_xlabel(xlabel)
    ax.set_ylabel(ylabel)
    return mpl2img(fig)