dashflaskcss

import dash
import dash_core_components as dcc
import dash_html_components as html

import flask
import os

app = dash.Dash()

app.layout = html.Div('Hello World')

# Add a static image route that serves images from desktop
# Be *very* careful here - you don't want to serve arbitrary files
# from your computer or server
css_directory = os.getcwd()
stylesheets = ['stylesheet.css']
static_css_route = '/static/'


@app.server.route('{}<stylesheet>'.format(static_css_route))
def serve_stylesheet(stylesheet):
    if stylesheet not in stylesheets:
        raise Exception(
            '"{}" is excluded from the allowed static files'.format(
                stylesheet
            )
        )
    return flask.send_from_directory(css_directory, stylesheet)


for stylesheet in stylesheets:
    app.css.append_css({"external_url": "/static/{}".format(stylesheet)})

if __name__ == '__main__':
    app.run_server(debug=True)
    
#https://github.com/plotly/dash/issues/71
#https://community.plot.ly/t/how-do-i-use-dash-to-add-local-css/4914/3