import plotly.graph_objects as go
import numpy as np
from base64 import b64encode
from plotly.offline import plot
import plotly.express as px


class PlotSys:
    def __init__(self, store):
        self.store = store

    def pieChart(self):
        df = px.data.gapminder().query("year == 2007").query("continent == 'Europe'")
        df.loc[df['pop'] < 2.e6, 'country'] = 'Other countries' # Represent only large countries
        fig = px.pie(df, values='pop', names='country', title='Population of European continent')
        #fig.show()
        return plot(fig, output_type='div')