import dash import dash_core_components as dcc import dash_html_components as html import flask import os appname = 'testapp' app = dash.Dash(__name__) app.config.requests_pathname_prefix = '/{}/'.format( appname ) app.layout = html.Div('Hello World') stylesheet = 'stylesheet.css' @app.server.route('/{}/{}'.format(appname, stylesheet)) def serve_stylesheet(): return flask.send_from_directory(os.getcwd(), stylesheet) app.css.append_css({"external_url": "/static/{}".format(stylesheet)}) if __name__ == '__main__': app.run_server(debug=True)