app.py

from flask import Flask, render_template, request
import pandas as pd

from data_generator import DataReader
from plotly_graph import PlotlyGraph
from config_parser import parse_default_config

def create_app(config_fn=None, data_path=None):
    app = Flask(__name__)
    app_config = parse_default_config(additional_config_fn=config_fn)
    if data_path is not None:
        app_config['data_path'] = data_path
    app.config['dashboard_config'] = app_config

    @app.route('/', methods=['GET', 'POST'])
    def brownian_plot():
        config = app.config['dashboard_config']
        print('reading data from: ', config['data_path'])
        df = DataReader().data_frame(config['data_path'])
        if request.method == "POST":
            plot_color = request.form["color"]
        else:
            plot_color = 'blue'

        plotly_graph = PlotlyGraph(
            config['index_col_name'],
            config['value_col_name'],
            plot_color)
        json_graph = plotly_graph.get_json_graph(df)
        return render_template(
            'graph_plot.html',
            plot=json_graph,
            colors=config['colors'],
            plot_color=plot_color)

    return app

if __name__ == '__main__':
    app = create_app(config_fn="config/flask_app_config.yaml")
    app.run()